/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-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:07:11,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:07:11,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:07:11,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 16:07:11,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 16:07:11,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 16:07:11,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 16:07:11,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 16:07:11,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 16:07:11,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 16:07:11,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 16:07:11,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 16:07:11,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 16:07:11,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 16:07:11,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 16:07:11,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:07:11,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:07:11,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:07:11,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:07:11,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:07:11,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:07:11,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:07:11,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:07:11,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:07:11,373 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:07:11,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:07:11,374 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:07:11,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:07:11,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:07:11,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:07:11,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:07:11,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:07:11,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:07:11,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:07:11,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:07:11,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:07:11,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:07:11,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:07:11,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:07:11,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:07:11,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:07:11,377 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:07:11,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:07:11,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:07:11,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:07:11,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:07:11,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:07:11,628 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:07:11,629 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:07:11,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2022-03-15 16:07:11,630 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2022-03-15 16:07:11,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:07:11,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:07:11,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:07:11,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:07:11,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:07:11,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,677 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:07:11,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:07:11,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:07:11,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:07:11,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:07:11,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:07:11,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:07:11,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:07:11,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:07:11,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/1) ... [2022-03-15 16:07:11,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:07:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:11,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:07:11,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:07:11,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:07:11,775 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:07:11,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:07:11,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:07:11,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:07:11,776 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:07:11,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:07:11,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:07:11,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:07:11,776 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:07:11,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:07:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:07:11,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 16:07:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 16:07:11,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 16:07:11,779 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:07:11,820 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:07:11,822 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:07:11,935 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:07:11,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:07:11,967 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-15 16:07:11,968 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-15 16:07:11,968 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-03-15 16:07:11,969 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-03-15 16:07:11,971 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:07:11 BoogieIcfgContainer [2022-03-15 16:07:11,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:07:11,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:07:11,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:07:11,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:07:11,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:07:11" (1/2) ... [2022-03-15 16:07:11,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d9dd0e and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:07:11, skipping insertion in model container [2022-03-15 16:07:11,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:07:11" (2/2) ... [2022-03-15 16:07:11,979 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2022-03-15 16:07:11,987 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:07:11,987 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:07:11,988 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:07:11,988 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:07:12,052 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-03-15 16:07:12,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:07:12,139 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:07:12,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-03-15 16:07:12,152 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2022-03-15 16:07:12,202 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:07:12,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:12,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:12,214 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1639101113, now seen corresponding path program 1 times [2022-03-15 16:07:12,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:12,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518789045] [2022-03-15 16:07:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:12,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:12,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518789045] [2022-03-15 16:07:12,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518789045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:12,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:12,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:07:12,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127742080] [2022-03-15 16:07:12,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:12,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:07:12,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:07:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:07:12,447 INFO L87 Difference]: Start difference. First operand has 103 states, 102 states have (on average 2.911764705882353) internal successors, (297), 102 states have internal predecessors, (297), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:12,561 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2022-03-15 16:07:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:07:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:07:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:12,580 INFO L225 Difference]: With dead ends: 253 [2022-03-15 16:07:12,580 INFO L226 Difference]: Without dead ends: 247 [2022-03-15 16:07:12,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:12,587 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:12,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 9 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-15 16:07:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2022-03-15 16:07:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2022-03-15 16:07:12,663 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2022-03-15 16:07:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:12,664 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2022-03-15 16:07:12,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2022-03-15 16:07:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:07:12,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:12,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:12,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:07:12,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash -852565589, now seen corresponding path program 2 times [2022-03-15 16:07:12,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:12,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105911673] [2022-03-15 16:07:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:12,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:12,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105911673] [2022-03-15 16:07:12,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105911673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:12,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:12,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:07:12,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920099649] [2022-03-15 16:07:12,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:07:12,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:07:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:07:12,745 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:12,885 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2022-03-15 16:07:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:07:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:07:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:12,890 INFO L225 Difference]: With dead ends: 262 [2022-03-15 16:07:12,891 INFO L226 Difference]: Without dead ends: 256 [2022-03-15 16:07:12,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:12,895 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:12,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-15 16:07:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2022-03-15 16:07:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2022-03-15 16:07:12,921 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2022-03-15 16:07:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:12,921 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2022-03-15 16:07:12,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2022-03-15 16:07:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:12,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:12,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:12,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:07:12,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash 105140105, now seen corresponding path program 1 times [2022-03-15 16:07:12,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:12,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167040912] [2022-03-15 16:07:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:12,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:12,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167040912] [2022-03-15 16:07:12,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167040912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:12,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879179181] [2022-03-15 16:07:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:12,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:12,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:12,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:12,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:07:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:07:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:13,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:13,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879179181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:13,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:13,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-15 16:07:13,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505019380] [2022-03-15 16:07:13,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:13,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:07:13,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:07:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:07:13,203 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:13,339 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2022-03-15 16:07:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:07:13,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:13,342 INFO L225 Difference]: With dead ends: 199 [2022-03-15 16:07:13,342 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 16:07:13,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:13,343 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:13,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 42 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 16:07:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2022-03-15 16:07:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2022-03-15 16:07:13,364 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2022-03-15 16:07:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:13,364 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2022-03-15 16:07:13,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2022-03-15 16:07:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:13,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:13,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:13,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:13,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:13,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1032435817, now seen corresponding path program 1 times [2022-03-15 16:07:13,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:13,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79866931] [2022-03-15 16:07:13,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:13,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:13,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:13,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79866931] [2022-03-15 16:07:13,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79866931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:13,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:13,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:13,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841785674] [2022-03-15 16:07:13,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:13,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:13,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:13,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:13,636 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:13,775 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2022-03-15 16:07:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:07:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:13,778 INFO L225 Difference]: With dead ends: 246 [2022-03-15 16:07:13,778 INFO L226 Difference]: Without dead ends: 214 [2022-03-15 16:07:13,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:13,785 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:13,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 41 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-15 16:07:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2022-03-15 16:07:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2022-03-15 16:07:13,806 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2022-03-15 16:07:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:13,806 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2022-03-15 16:07:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2022-03-15 16:07:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:13,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:13,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:13,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:07:13,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 973094452, now seen corresponding path program 1 times [2022-03-15 16:07:13,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:13,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016715074] [2022-03-15 16:07:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:13,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:13,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:13,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016715074] [2022-03-15 16:07:13,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016715074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:13,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:13,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:07:13,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363856079] [2022-03-15 16:07:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:13,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:07:13,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:07:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:07:13,833 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:13,867 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2022-03-15 16:07:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:07:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:13,869 INFO L225 Difference]: With dead ends: 153 [2022-03-15 16:07:13,869 INFO L226 Difference]: Without dead ends: 137 [2022-03-15 16:07:13,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:07:13,870 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:13,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:07:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-15 16:07:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-03-15 16:07:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2022-03-15 16:07:13,885 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2022-03-15 16:07:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:13,891 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2022-03-15 16:07:13,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2022-03-15 16:07:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:13,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:13,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:13,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:07:13,892 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 804217187, now seen corresponding path program 2 times [2022-03-15 16:07:13,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:13,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500243591] [2022-03-15 16:07:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:13,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:13,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:13,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500243591] [2022-03-15 16:07:13,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500243591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:13,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761029918] [2022-03-15 16:07:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:13,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:13,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:13,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:07:13,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:13,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:07:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:14,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761029918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:14,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:14,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 16:07:14,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905761403] [2022-03-15 16:07:14,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:14,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:07:14,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:07:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:07:14,138 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:14,231 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2022-03-15 16:07:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:07:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:14,233 INFO L225 Difference]: With dead ends: 205 [2022-03-15 16:07:14,233 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 16:07:14,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:14,234 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:14,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 16:07:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2022-03-15 16:07:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2022-03-15 16:07:14,239 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2022-03-15 16:07:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:14,239 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2022-03-15 16:07:14,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2022-03-15 16:07:14,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:14,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:14,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:14,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:14,463 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,SelfDestructingSolverStorable5 [2022-03-15 16:07:14,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:14,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash 26248067, now seen corresponding path program 2 times [2022-03-15 16:07:14,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:14,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162585775] [2022-03-15 16:07:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:14,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:14,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162585775] [2022-03-15 16:07:14,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162585775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:14,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:14,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:14,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092893301] [2022-03-15 16:07:14,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:14,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:14,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:14,502 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:14,639 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2022-03-15 16:07:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:07:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:14,641 INFO L225 Difference]: With dead ends: 253 [2022-03-15 16:07:14,641 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 16:07:14,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:07:14,642 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:14,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 16:07:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2022-03-15 16:07:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2022-03-15 16:07:14,649 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2022-03-15 16:07:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:14,649 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2022-03-15 16:07:14,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2022-03-15 16:07:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:14,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:14,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:14,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 16:07:14,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -738712767, now seen corresponding path program 3 times [2022-03-15 16:07:14,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:14,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951455911] [2022-03-15 16:07:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:14,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:14,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951455911] [2022-03-15 16:07:14,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951455911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:14,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:14,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:14,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056849820] [2022-03-15 16:07:14,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:14,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:14,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:14,679 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:14,762 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2022-03-15 16:07:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:07:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:14,764 INFO L225 Difference]: With dead ends: 193 [2022-03-15 16:07:14,764 INFO L226 Difference]: Without dead ends: 193 [2022-03-15 16:07:14,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:07:14,765 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:14,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-15 16:07:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-03-15 16:07:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2022-03-15 16:07:14,770 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 18 [2022-03-15 16:07:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:14,770 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2022-03-15 16:07:14,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2022-03-15 16:07:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:14,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:14,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:14,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 16:07:14,771 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:14,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1491858461, now seen corresponding path program 3 times [2022-03-15 16:07:14,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:14,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192333727] [2022-03-15 16:07:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:14,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:14,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192333727] [2022-03-15 16:07:14,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192333727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:14,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:14,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:14,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037297262] [2022-03-15 16:07:14,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:14,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:14,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:14,799 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:14,870 INFO L93 Difference]: Finished difference Result 193 states and 512 transitions. [2022-03-15 16:07:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:07:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:14,871 INFO L225 Difference]: With dead ends: 193 [2022-03-15 16:07:14,871 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 16:07:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:14,872 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:14,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 16:07:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2022-03-15 16:07:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-03-15 16:07:14,877 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-03-15 16:07:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:14,877 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-03-15 16:07:14,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-03-15 16:07:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:14,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:14,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:14,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 16:07:14,878 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1888362025, now seen corresponding path program 4 times [2022-03-15 16:07:14,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:14,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433900411] [2022-03-15 16:07:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:14,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:14,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433900411] [2022-03-15 16:07:14,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433900411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:14,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336525732] [2022-03-15 16:07:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:07:14,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:14,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:14,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:07:14,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:07:14,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:14,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:07:14,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336525732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:15,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:15,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 16:07:15,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379637408] [2022-03-15 16:07:15,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:15,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:07:15,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:07:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:07:15,060 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:15,159 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2022-03-15 16:07:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:07:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:15,160 INFO L225 Difference]: With dead ends: 193 [2022-03-15 16:07:15,161 INFO L226 Difference]: Without dead ends: 193 [2022-03-15 16:07:15,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:15,161 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:15,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-15 16:07:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-03-15 16:07:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-03-15 16:07:15,166 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-03-15 16:07:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:15,167 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-03-15 16:07:15,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-03-15 16:07:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:15,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:15,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:15,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:15,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:15,390 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash 978830285, now seen corresponding path program 4 times [2022-03-15 16:07:15,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:15,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066880090] [2022-03-15 16:07:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:15,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:15,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066880090] [2022-03-15 16:07:15,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066880090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:15,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:15,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:15,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712447793] [2022-03-15 16:07:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:15,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:15,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:15,426 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:15,518 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2022-03-15 16:07:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:07:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:15,520 INFO L225 Difference]: With dead ends: 197 [2022-03-15 16:07:15,520 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 16:07:15,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:15,521 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:15,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 36 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 16:07:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2022-03-15 16:07:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-03-15 16:07:15,528 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-03-15 16:07:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:15,528 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-03-15 16:07:15,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-03-15 16:07:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:15,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:15,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:15,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-15 16:07:15,530 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:15,530 INFO L85 PathProgramCache]: Analyzing trace with hash 354089523, now seen corresponding path program 5 times [2022-03-15 16:07:15,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:15,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443509127] [2022-03-15 16:07:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:15,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443509127] [2022-03-15 16:07:15,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443509127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:15,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:15,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:15,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18525862] [2022-03-15 16:07:15,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:15,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:15,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:15,575 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:15,649 INFO L93 Difference]: Finished difference Result 190 states and 506 transitions. [2022-03-15 16:07:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:07:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:15,651 INFO L225 Difference]: With dead ends: 190 [2022-03-15 16:07:15,651 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 16:07:15,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:07:15,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:15,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 16:07:15,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2022-03-15 16:07:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-03-15 16:07:15,657 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-03-15 16:07:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:15,657 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-03-15 16:07:15,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-03-15 16:07:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:15,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:15,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:15,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-15 16:07:15,658 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1710306545, now seen corresponding path program 5 times [2022-03-15 16:07:15,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:15,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305608156] [2022-03-15 16:07:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:15,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305608156] [2022-03-15 16:07:15,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305608156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:15,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:15,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:15,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117939365] [2022-03-15 16:07:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:15,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:15,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:15,683 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:15,787 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2022-03-15 16:07:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:07:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:15,789 INFO L225 Difference]: With dead ends: 248 [2022-03-15 16:07:15,789 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 16:07:15,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:07:15,789 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:15,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 58 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 16:07:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-03-15 16:07:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2022-03-15 16:07:15,795 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2022-03-15 16:07:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:15,796 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2022-03-15 16:07:15,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2022-03-15 16:07:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:15,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:15,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:15,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-15 16:07:15,797 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:15,797 INFO L85 PathProgramCache]: Analyzing trace with hash 759478481, now seen corresponding path program 6 times [2022-03-15 16:07:15,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:15,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140825884] [2022-03-15 16:07:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:15,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:15,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140825884] [2022-03-15 16:07:15,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140825884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:15,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:15,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:15,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163634137] [2022-03-15 16:07:15,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:15,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:15,821 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:15,902 INFO L93 Difference]: Finished difference Result 178 states and 466 transitions. [2022-03-15 16:07:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:07:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:15,904 INFO L225 Difference]: With dead ends: 178 [2022-03-15 16:07:15,904 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 16:07:15,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:07:15,905 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:15,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 16:07:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2022-03-15 16:07:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.798507462686567) internal successors, (375), 134 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 375 transitions. [2022-03-15 16:07:15,910 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 375 transitions. Word has length 18 [2022-03-15 16:07:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:15,910 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 375 transitions. [2022-03-15 16:07:15,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 375 transitions. [2022-03-15 16:07:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:07:15,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:15,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-15 16:07:15,912 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 631984787, now seen corresponding path program 6 times [2022-03-15 16:07:15,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:15,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529977010] [2022-03-15 16:07:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:15,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:15,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529977010] [2022-03-15 16:07:15,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529977010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:07:15,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:07:15,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 16:07:15,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651138136] [2022-03-15 16:07:15,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:07:15,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:07:15,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:07:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:07:15,946 INFO L87 Difference]: Start difference. First operand 135 states and 375 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:16,028 INFO L93 Difference]: Finished difference Result 139 states and 378 transitions. [2022-03-15 16:07:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:07:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:07:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:16,029 INFO L225 Difference]: With dead ends: 139 [2022-03-15 16:07:16,029 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 16:07:16,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:07:16,032 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:16,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:07:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 16:07:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-15 16:07:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2022-03-15 16:07:16,036 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2022-03-15 16:07:16,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:16,036 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2022-03-15 16:07:16,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2022-03-15 16:07:16,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:16,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:16,037 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] [2022-03-15 16:07:16,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-15 16:07:16,037 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2083966421, now seen corresponding path program 1 times [2022-03-15 16:07:16,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:16,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662433357] [2022-03-15 16:07:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:16,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:16,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:16,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662433357] [2022-03-15 16:07:16,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662433357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:16,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033899112] [2022-03-15 16:07:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:16,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:16,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:16,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:16,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:07:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:16,422 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 16 treesize of output 10 [2022-03-15 16:07:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:16,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:16,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:16,568 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-15 16:07:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:16,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:07:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:16,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033899112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:16,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:16,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-15 16:07:16,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141192725] [2022-03-15 16:07:16,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:16,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:07:16,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:07:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:07:16,609 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:17,071 INFO L93 Difference]: Finished difference Result 374 states and 1062 transitions. [2022-03-15 16:07:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:07:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:17,073 INFO L225 Difference]: With dead ends: 374 [2022-03-15 16:07:17,073 INFO L226 Difference]: Without dead ends: 364 [2022-03-15 16:07:17,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:07:17,085 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 125 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:17,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 44 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-03-15 16:07:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-15 16:07:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 186. [2022-03-15 16:07:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2022-03-15 16:07:17,091 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2022-03-15 16:07:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:17,091 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2022-03-15 16:07:17,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2022-03-15 16:07:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:17,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:17,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:07:17,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:17,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 16:07:17,305 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1077905909, now seen corresponding path program 2 times [2022-03-15 16:07:17,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:17,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826041158] [2022-03-15 16:07:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:17,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:17,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:17,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826041158] [2022-03-15 16:07:17,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826041158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:17,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19640147] [2022-03-15 16:07:17,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:17,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:17,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:17,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:17,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:07:17,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:17,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:17,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:17,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:17,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:17,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:17,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:18,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:18,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-15 16:07:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:18,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19640147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:18,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:18,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:07:18,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450999286] [2022-03-15 16:07:18,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:18,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:07:18,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:07:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:07:18,475 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:20,229 INFO L93 Difference]: Finished difference Result 575 states and 1655 transitions. [2022-03-15 16:07:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:07:20,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20 [2022-03-15 16:07:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:20,232 INFO L225 Difference]: With dead ends: 575 [2022-03-15 16:07:20,232 INFO L226 Difference]: Without dead ends: 556 [2022-03-15 16:07:20,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:07:20,234 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 291 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:20,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 89 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 953 Invalid, 0 Unknown, 963 Unchecked, 0.5s Time] [2022-03-15 16:07:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-03-15 16:07:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 210. [2022-03-15 16:07:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.8325358851674642) internal successors, (592), 209 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 592 transitions. [2022-03-15 16:07:20,243 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 592 transitions. Word has length 20 [2022-03-15 16:07:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:20,243 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 592 transitions. [2022-03-15 16:07:20,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 592 transitions. [2022-03-15 16:07:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:20,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:20,244 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] [2022-03-15 16:07:20,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:20,459 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,SelfDestructingSolverStorable16 [2022-03-15 16:07:20,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 800910909, now seen corresponding path program 3 times [2022-03-15 16:07:20,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:20,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594023529] [2022-03-15 16:07:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:20,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:20,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594023529] [2022-03-15 16:07:20,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594023529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:20,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904037026] [2022-03-15 16:07:20,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:07:20,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:20,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:20,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:07:20,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:07:20,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:20,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:20,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:20,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:21,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:21,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-15 16:07:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:21,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904037026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:21,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:21,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:07:21,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821904013] [2022-03-15 16:07:21,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:21,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:07:21,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:07:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:07:21,390 INFO L87 Difference]: Start difference. First operand 210 states and 592 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:23,991 INFO L93 Difference]: Finished difference Result 621 states and 1767 transitions. [2022-03-15 16:07:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:07:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 20 [2022-03-15 16:07:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:23,994 INFO L225 Difference]: With dead ends: 621 [2022-03-15 16:07:23,994 INFO L226 Difference]: Without dead ends: 591 [2022-03-15 16:07:23,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=882, Invalid=4520, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:07:23,996 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 319 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:23,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 69 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1137 Invalid, 0 Unknown, 495 Unchecked, 0.7s Time] [2022-03-15 16:07:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-15 16:07:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 227. [2022-03-15 16:07:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.849557522123894) internal successors, (644), 226 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 644 transitions. [2022-03-15 16:07:24,005 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 644 transitions. Word has length 20 [2022-03-15 16:07:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:24,005 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 644 transitions. [2022-03-15 16:07:24,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 644 transitions. [2022-03-15 16:07:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:24,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:24,006 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] [2022-03-15 16:07:24,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:24,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:07:24,220 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash -32827531, now seen corresponding path program 4 times [2022-03-15 16:07:24,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:24,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373293693] [2022-03-15 16:07:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:24,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:24,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373293693] [2022-03-15 16:07:24,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373293693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:24,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664288756] [2022-03-15 16:07:24,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:07:24,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:24,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:24,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:07:24,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:07:24,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:24,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:24,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:24,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:24,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:07:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:24,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:24,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:24,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:07:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:24,697 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:07:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:24,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664288756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:24,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:24,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:07:24,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132957742] [2022-03-15 16:07:24,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:24,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:07:24,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:07:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:07:24,725 INFO L87 Difference]: Start difference. First operand 227 states and 644 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:25,033 INFO L93 Difference]: Finished difference Result 334 states and 957 transitions. [2022-03-15 16:07:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:07:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:25,035 INFO L225 Difference]: With dead ends: 334 [2022-03-15 16:07:25,035 INFO L226 Difference]: Without dead ends: 323 [2022-03-15 16:07:25,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:07:25,036 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:25,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-03-15 16:07:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-15 16:07:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2022-03-15 16:07:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.858974358974359) internal successors, (669), 234 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 669 transitions. [2022-03-15 16:07:25,053 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 669 transitions. Word has length 20 [2022-03-15 16:07:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:25,053 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 669 transitions. [2022-03-15 16:07:25,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 669 transitions. [2022-03-15 16:07:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:25,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:25,054 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] [2022-03-15 16:07:25,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:25,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:25,278 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -669294385, now seen corresponding path program 5 times [2022-03-15 16:07:25,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:25,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436621112] [2022-03-15 16:07:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:25,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:25,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436621112] [2022-03-15 16:07:25,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436621112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:25,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328414600] [2022-03-15 16:07:25,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:07:25,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:25,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:25,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:07:25,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:25,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:25,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:25,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:07:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:25,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:25,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:25,710 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-15 16:07:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:25,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:07:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:25,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328414600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:25,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:25,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:07:25,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422641973] [2022-03-15 16:07:25,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:25,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:07:25,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:07:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:07:25,739 INFO L87 Difference]: Start difference. First operand 235 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:26,037 INFO L93 Difference]: Finished difference Result 335 states and 955 transitions. [2022-03-15 16:07:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:07:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:26,039 INFO L225 Difference]: With dead ends: 335 [2022-03-15 16:07:26,039 INFO L226 Difference]: Without dead ends: 325 [2022-03-15 16:07:26,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:07:26,040 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:26,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 574 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-03-15 16:07:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-03-15 16:07:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 231. [2022-03-15 16:07:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2022-03-15 16:07:26,046 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 20 [2022-03-15 16:07:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:26,047 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2022-03-15 16:07:26,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2022-03-15 16:07:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:26,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:26,048 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] [2022-03-15 16:07:26,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:26,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:26,248 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1927902218, now seen corresponding path program 1 times [2022-03-15 16:07:26,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:26,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224000265] [2022-03-15 16:07:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:26,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:26,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:26,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224000265] [2022-03-15 16:07:26,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224000265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:26,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984949975] [2022-03-15 16:07:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:26,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:26,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:07:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:26,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:26,555 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 16 treesize of output 10 [2022-03-15 16:07:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:26,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:26,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:26,697 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 11 treesize of output 16 [2022-03-15 16:07:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:26,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:07:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:26,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984949975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:26,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:26,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-15 16:07:26,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560555071] [2022-03-15 16:07:26,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:26,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:07:26,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:07:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:07:26,739 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:27,154 INFO L93 Difference]: Finished difference Result 475 states and 1356 transitions. [2022-03-15 16:07:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:07:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:27,157 INFO L225 Difference]: With dead ends: 475 [2022-03-15 16:07:27,157 INFO L226 Difference]: Without dead ends: 466 [2022-03-15 16:07:27,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:07:27,158 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:27,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 63 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 646 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-03-15 16:07:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-15 16:07:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 239. [2022-03-15 16:07:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.8865546218487395) internal successors, (687), 238 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 687 transitions. [2022-03-15 16:07:27,168 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 687 transitions. Word has length 20 [2022-03-15 16:07:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:27,169 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 687 transitions. [2022-03-15 16:07:27,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 687 transitions. [2022-03-15 16:07:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:27,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:27,170 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] [2022-03-15 16:07:27,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 16:07:27,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:27,387 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash 475594560, now seen corresponding path program 2 times [2022-03-15 16:07:27,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:27,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857636754] [2022-03-15 16:07:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:27,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:27,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857636754] [2022-03-15 16:07:27,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857636754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:27,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238928855] [2022-03-15 16:07:27,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:27,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:27,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:27,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:27,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:07:27,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:27,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:27,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:27,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:27,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:27,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:28,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:28,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-15 16:07:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:28,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238928855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:28,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:28,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:07:28,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437910462] [2022-03-15 16:07:28,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:28,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:07:28,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:28,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:07:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:07:28,343 INFO L87 Difference]: Start difference. First operand 239 states and 687 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:30,211 INFO L93 Difference]: Finished difference Result 655 states and 1874 transitions. [2022-03-15 16:07:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:07:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20 [2022-03-15 16:07:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:30,214 INFO L225 Difference]: With dead ends: 655 [2022-03-15 16:07:30,214 INFO L226 Difference]: Without dead ends: 631 [2022-03-15 16:07:30,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=612, Invalid=3420, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:07:30,215 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 250 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:30,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 104 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1005 Invalid, 0 Unknown, 933 Unchecked, 0.5s Time] [2022-03-15 16:07:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-03-15 16:07:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 273. [2022-03-15 16:07:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.926470588235294) internal successors, (796), 272 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 796 transitions. [2022-03-15 16:07:30,224 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 796 transitions. Word has length 20 [2022-03-15 16:07:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:30,224 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 796 transitions. [2022-03-15 16:07:30,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 796 transitions. [2022-03-15 16:07:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:30,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:30,225 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] [2022-03-15 16:07:30,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:30,439 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,SelfDestructingSolverStorable21 [2022-03-15 16:07:30,439 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1331859903, now seen corresponding path program 1 times [2022-03-15 16:07:30,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:30,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410285383] [2022-03-15 16:07:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:30,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:30,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410285383] [2022-03-15 16:07:30,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410285383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:30,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497455061] [2022-03-15 16:07:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:30,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:30,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:30,542 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:30,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:07:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:30,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:30,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:30,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:30,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:07:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:30,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:30,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:30,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:07:30,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:30,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:07:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:30,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497455061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:30,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:30,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-15 16:07:30,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998785386] [2022-03-15 16:07:30,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:30,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:07:30,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:07:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:07:30,941 INFO L87 Difference]: Start difference. First operand 273 states and 796 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:31,132 INFO L93 Difference]: Finished difference Result 365 states and 1051 transitions. [2022-03-15 16:07:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:07:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:31,134 INFO L225 Difference]: With dead ends: 365 [2022-03-15 16:07:31,134 INFO L226 Difference]: Without dead ends: 363 [2022-03-15 16:07:31,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:07:31,134 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:31,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 57 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-03-15 16:07:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-15 16:07:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 287. [2022-03-15 16:07:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9195804195804196) internal successors, (835), 286 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 835 transitions. [2022-03-15 16:07:31,141 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 835 transitions. Word has length 20 [2022-03-15 16:07:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:31,141 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 835 transitions. [2022-03-15 16:07:31,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 835 transitions. [2022-03-15 16:07:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:31,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:31,142 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] [2022-03-15 16:07:31,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-15 16:07:31,355 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,SelfDestructingSolverStorable22 [2022-03-15 16:07:31,355 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash -941602499, now seen corresponding path program 2 times [2022-03-15 16:07:31,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:31,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616960403] [2022-03-15 16:07:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:31,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:31,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:31,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616960403] [2022-03-15 16:07:31,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616960403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:31,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397180815] [2022-03-15 16:07:31,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:31,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:31,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:31,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:07:31,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:31,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:31,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:31,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:31,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-15 16:07:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:32,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:32,135 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 20 treesize of output 21 [2022-03-15 16:07:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:32,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397180815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:32,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:32,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:07:32,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864573843] [2022-03-15 16:07:32,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:32,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:07:32,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:07:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:07:32,253 INFO L87 Difference]: Start difference. First operand 287 states and 835 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:34,128 INFO L93 Difference]: Finished difference Result 728 states and 2055 transitions. [2022-03-15 16:07:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:07:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20 [2022-03-15 16:07:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:34,131 INFO L225 Difference]: With dead ends: 728 [2022-03-15 16:07:34,131 INFO L226 Difference]: Without dead ends: 714 [2022-03-15 16:07:34,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=603, Invalid=3557, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:07:34,132 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 301 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1016 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:34,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 92 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 961 Invalid, 0 Unknown, 1016 Unchecked, 0.5s Time] [2022-03-15 16:07:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-15 16:07:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 268. [2022-03-15 16:07:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.932584269662921) internal successors, (783), 267 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 783 transitions. [2022-03-15 16:07:34,141 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 783 transitions. Word has length 20 [2022-03-15 16:07:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:34,141 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 783 transitions. [2022-03-15 16:07:34,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 783 transitions. [2022-03-15 16:07:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:34,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:34,142 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] [2022-03-15 16:07:34,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:34,343 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,SelfDestructingSolverStorable23 [2022-03-15 16:07:34,343 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001128, now seen corresponding path program 3 times [2022-03-15 16:07:34,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:34,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251679183] [2022-03-15 16:07:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:34,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:34,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:34,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251679183] [2022-03-15 16:07:34,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251679183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:34,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354635396] [2022-03-15 16:07:34,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:07:34,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:34,449 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:34,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:07:34,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:07:34,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:34,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:34,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:34,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:35,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:35,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-15 16:07:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:35,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354635396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:35,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:35,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:07:35,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827495565] [2022-03-15 16:07:35,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:35,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:07:35,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:07:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:07:35,109 INFO L87 Difference]: Start difference. First operand 268 states and 783 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:37,568 INFO L93 Difference]: Finished difference Result 663 states and 1899 transitions. [2022-03-15 16:07:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:07:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 20 [2022-03-15 16:07:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:37,571 INFO L225 Difference]: With dead ends: 663 [2022-03-15 16:07:37,571 INFO L226 Difference]: Without dead ends: 636 [2022-03-15 16:07:37,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=948, Invalid=4904, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:07:37,572 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 341 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:37,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 81 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1159 Invalid, 0 Unknown, 656 Unchecked, 0.6s Time] [2022-03-15 16:07:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-15 16:07:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 279. [2022-03-15 16:07:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.946043165467626) internal successors, (819), 278 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 819 transitions. [2022-03-15 16:07:37,581 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 819 transitions. Word has length 20 [2022-03-15 16:07:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:37,581 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 819 transitions. [2022-03-15 16:07:37,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 819 transitions. [2022-03-15 16:07:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:37,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:37,582 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] [2022-03-15 16:07:37,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:37,795 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,SelfDestructingSolverStorable24 [2022-03-15 16:07:37,795 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash -342712452, now seen corresponding path program 4 times [2022-03-15 16:07:37,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:37,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236542017] [2022-03-15 16:07:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:37,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:37,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236542017] [2022-03-15 16:07:37,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236542017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:37,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620641145] [2022-03-15 16:07:37,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:07:37,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:37,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:37,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:37,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:07:37,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:07:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:38,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:38,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:07:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:38,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:38,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:38,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:07:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:38,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:07:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:38,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620641145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:38,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:38,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:07:38,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935914496] [2022-03-15 16:07:38,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:07:38,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:07:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:07:38,243 INFO L87 Difference]: Start difference. First operand 279 states and 819 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:38,507 INFO L93 Difference]: Finished difference Result 383 states and 1131 transitions. [2022-03-15 16:07:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:07:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:38,509 INFO L225 Difference]: With dead ends: 383 [2022-03-15 16:07:38,509 INFO L226 Difference]: Without dead ends: 372 [2022-03-15 16:07:38,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:07:38,510 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:38,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 33 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 553 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-03-15 16:07:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-03-15 16:07:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 281. [2022-03-15 16:07:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.95) internal successors, (826), 280 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 826 transitions. [2022-03-15 16:07:38,517 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 826 transitions. Word has length 20 [2022-03-15 16:07:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:38,517 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 826 transitions. [2022-03-15 16:07:38,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 826 transitions. [2022-03-15 16:07:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:38,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:38,518 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] [2022-03-15 16:07:38,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:38,740 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -285788795, now seen corresponding path program 6 times [2022-03-15 16:07:38,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:38,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782708762] [2022-03-15 16:07:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:38,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:38,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:38,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782708762] [2022-03-15 16:07:38,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782708762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:38,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821358212] [2022-03-15 16:07:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:07:38,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:38,882 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:38,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:07:38,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:07:38,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:39,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:39,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:39,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:39,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:07:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:39,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821358212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:39,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:39,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:07:39,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853328535] [2022-03-15 16:07:39,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:39,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:07:39,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:07:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:07:39,653 INFO L87 Difference]: Start difference. First operand 281 states and 826 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:41,368 INFO L93 Difference]: Finished difference Result 646 states and 1825 transitions. [2022-03-15 16:07:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:07:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20 [2022-03-15 16:07:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:41,370 INFO L225 Difference]: With dead ends: 646 [2022-03-15 16:07:41,370 INFO L226 Difference]: Without dead ends: 607 [2022-03-15 16:07:41,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:07:41,371 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 312 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:41,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 108 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1108 Invalid, 0 Unknown, 470 Unchecked, 0.5s Time] [2022-03-15 16:07:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-15 16:07:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 308. [2022-03-15 16:07:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-03-15 16:07:41,380 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-03-15 16:07:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-03-15 16:07:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-03-15 16:07:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:41,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:41,381 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] [2022-03-15 16:07:41,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:41,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:07:41,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2093243258, now seen corresponding path program 1 times [2022-03-15 16:07:41,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:41,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818686525] [2022-03-15 16:07:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:41,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:41,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818686525] [2022-03-15 16:07:41,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818686525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:41,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777239307] [2022-03-15 16:07:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:41,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:41,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:41,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:41,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:07:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:41,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:41,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:41,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:41,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:07:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:41,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:42,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:42,074 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 15 treesize of output 20 [2022-03-15 16:07:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:42,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:07:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:42,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777239307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:42,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:42,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-15 16:07:42,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115785619] [2022-03-15 16:07:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:07:42,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:07:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:07:42,119 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:42,295 INFO L93 Difference]: Finished difference Result 396 states and 1143 transitions. [2022-03-15 16:07:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:07:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:42,297 INFO L225 Difference]: With dead ends: 396 [2022-03-15 16:07:42,297 INFO L226 Difference]: Without dead ends: 391 [2022-03-15 16:07:42,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:07:42,297 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:42,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 305 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-03-15 16:07:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-03-15 16:07:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2022-03-15 16:07:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-03-15 16:07:42,307 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 20 [2022-03-15 16:07:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:42,307 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-03-15 16:07:42,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-03-15 16:07:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:42,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:42,308 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] [2022-03-15 16:07:42,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:42,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:07:42,531 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1848967994, now seen corresponding path program 1 times [2022-03-15 16:07:42,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:42,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904424232] [2022-03-15 16:07:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:42,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:42,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904424232] [2022-03-15 16:07:42,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904424232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:42,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704813067] [2022-03-15 16:07:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:42,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:42,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:07:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:42,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:42,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:07:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:42,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:42,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:42,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 20 [2022-03-15 16:07:42,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:42,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:07:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:43,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704813067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:43,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:43,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:07:43,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929083535] [2022-03-15 16:07:43,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:43,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:07:43,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:07:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:07:43,002 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:43,316 INFO L93 Difference]: Finished difference Result 426 states and 1230 transitions. [2022-03-15 16:07:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:07:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:43,318 INFO L225 Difference]: With dead ends: 426 [2022-03-15 16:07:43,318 INFO L226 Difference]: Without dead ends: 420 [2022-03-15 16:07:43,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:07:43,319 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:43,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 59 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 694 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-03-15 16:07:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-03-15 16:07:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 302. [2022-03-15 16:07:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9601328903654487) internal successors, (891), 301 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 891 transitions. [2022-03-15 16:07:43,326 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 891 transitions. Word has length 20 [2022-03-15 16:07:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:43,326 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 891 transitions. [2022-03-15 16:07:43,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 891 transitions. [2022-03-15 16:07:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:43,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:43,327 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] [2022-03-15 16:07:43,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:43,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:07:43,552 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1707463971, now seen corresponding path program 7 times [2022-03-15 16:07:43,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:43,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251562537] [2022-03-15 16:07:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:43,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:43,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251562537] [2022-03-15 16:07:43,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251562537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:43,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383313280] [2022-03-15 16:07:43,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:07:43,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:43,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:43,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:07:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:43,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:07:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:43,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:43,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:43,916 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 15 treesize of output 20 [2022-03-15 16:07:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:43,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:07:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:43,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383313280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:43,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:43,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:07:43,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374236568] [2022-03-15 16:07:43,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:43,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:07:43,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:07:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:07:43,961 INFO L87 Difference]: Start difference. First operand 302 states and 891 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:44,105 INFO L93 Difference]: Finished difference Result 375 states and 1093 transitions. [2022-03-15 16:07:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:07:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:44,107 INFO L225 Difference]: With dead ends: 375 [2022-03-15 16:07:44,107 INFO L226 Difference]: Without dead ends: 371 [2022-03-15 16:07:44,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:07:44,108 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:44,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-03-15 16:07:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-15 16:07:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 326. [2022-03-15 16:07:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9723076923076923) internal successors, (966), 325 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 966 transitions. [2022-03-15 16:07:44,115 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 966 transitions. Word has length 20 [2022-03-15 16:07:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:44,115 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 966 transitions. [2022-03-15 16:07:44,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 966 transitions. [2022-03-15 16:07:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:44,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:44,116 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] [2022-03-15 16:07:44,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:44,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:44,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1699999644, now seen corresponding path program 2 times [2022-03-15 16:07:44,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:44,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635867099] [2022-03-15 16:07:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:44,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:44,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:44,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635867099] [2022-03-15 16:07:44,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635867099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:44,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746795232] [2022-03-15 16:07:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:44,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:44,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:44,429 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:07:44,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:44,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:44,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:44,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:44,877 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 24 treesize of output 25 [2022-03-15 16:07:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:45,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746795232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:45,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:45,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:07:45,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703520265] [2022-03-15 16:07:45,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:45,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:07:45,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:07:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:07:45,003 INFO L87 Difference]: Start difference. First operand 326 states and 966 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:48,381 INFO L93 Difference]: Finished difference Result 849 states and 2328 transitions. [2022-03-15 16:07:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:07:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 20 [2022-03-15 16:07:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:48,385 INFO L225 Difference]: With dead ends: 849 [2022-03-15 16:07:48,385 INFO L226 Difference]: Without dead ends: 807 [2022-03-15 16:07:48,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:07:48,387 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 427 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:48,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 128 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1408 Invalid, 0 Unknown, 291 Unchecked, 0.7s Time] [2022-03-15 16:07:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-15 16:07:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 322. [2022-03-15 16:07:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.987538940809969) internal successors, (959), 321 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 959 transitions. [2022-03-15 16:07:48,396 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 959 transitions. Word has length 20 [2022-03-15 16:07:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:48,397 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 959 transitions. [2022-03-15 16:07:48,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 959 transitions. [2022-03-15 16:07:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:48,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:48,398 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] [2022-03-15 16:07:48,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:48,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:48,620 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -905666415, now seen corresponding path program 8 times [2022-03-15 16:07:48,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:48,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977753949] [2022-03-15 16:07:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:48,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:48,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:48,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977753949] [2022-03-15 16:07:48,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977753949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:48,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764918336] [2022-03-15 16:07:48,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:48,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:48,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:48,708 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:48,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:07:48,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:48,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:48,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:48,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:49,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:49,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:07:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:49,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764918336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:49,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:49,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:07:49,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558666429] [2022-03-15 16:07:49,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:49,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:07:49,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:07:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:07:49,298 INFO L87 Difference]: Start difference. First operand 322 states and 959 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:52,186 INFO L93 Difference]: Finished difference Result 762 states and 2119 transitions. [2022-03-15 16:07:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:07:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 20 [2022-03-15 16:07:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:52,190 INFO L225 Difference]: With dead ends: 762 [2022-03-15 16:07:52,190 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 16:07:52,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1205, Invalid=4197, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:07:52,191 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 359 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:52,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 96 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1346 Invalid, 0 Unknown, 327 Unchecked, 0.6s Time] [2022-03-15 16:07:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 16:07:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 321. [2022-03-15 16:07:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.0) internal successors, (960), 320 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 960 transitions. [2022-03-15 16:07:52,208 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 960 transitions. Word has length 20 [2022-03-15 16:07:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:52,209 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 960 transitions. [2022-03-15 16:07:52,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 960 transitions. [2022-03-15 16:07:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:52,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:52,210 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] [2022-03-15 16:07:52,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:52,432 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,SelfDestructingSolverStorable31 [2022-03-15 16:07:52,432 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash -149178578, now seen corresponding path program 5 times [2022-03-15 16:07:52,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:52,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937124878] [2022-03-15 16:07:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:52,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:52,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:52,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937124878] [2022-03-15 16:07:52,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937124878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:52,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937020168] [2022-03-15 16:07:52,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:07:52,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:52,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:52,554 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:52,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:07:52,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:52,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:07:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:52,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:52,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:52,877 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 20 [2022-03-15 16:07:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:52,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:07:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:52,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937020168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:52,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:52,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-15 16:07:52,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152508453] [2022-03-15 16:07:52,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:52,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:07:52,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:07:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:07:52,917 INFO L87 Difference]: Start difference. First operand 321 states and 960 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:53,101 INFO L93 Difference]: Finished difference Result 406 states and 1198 transitions. [2022-03-15 16:07:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:07:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:53,102 INFO L225 Difference]: With dead ends: 406 [2022-03-15 16:07:53,102 INFO L226 Difference]: Without dead ends: 400 [2022-03-15 16:07:53,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:07:53,103 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:53,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-03-15 16:07:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-15 16:07:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 330. [2022-03-15 16:07:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0091185410334345) internal successors, (990), 329 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 990 transitions. [2022-03-15 16:07:53,110 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 990 transitions. Word has length 20 [2022-03-15 16:07:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:53,110 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 990 transitions. [2022-03-15 16:07:53,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 990 transitions. [2022-03-15 16:07:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:53,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:53,111 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] [2022-03-15 16:07:53,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 16:07:53,332 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,SelfDestructingSolverStorable32 [2022-03-15 16:07:53,333 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1178685170, now seen corresponding path program 6 times [2022-03-15 16:07:53,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:53,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816713432] [2022-03-15 16:07:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:53,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:53,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:53,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816713432] [2022-03-15 16:07:53,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816713432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:53,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192467467] [2022-03-15 16:07:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:07:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:53,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:53,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:07:53,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:07:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:53,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:53,545 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:07:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:53,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:53,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:53,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:07:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:54,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192467467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:54,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:54,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:07:54,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767463145] [2022-03-15 16:07:54,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:54,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:07:54,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:07:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:07:54,056 INFO L87 Difference]: Start difference. First operand 330 states and 990 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:57,364 INFO L93 Difference]: Finished difference Result 799 states and 2191 transitions. [2022-03-15 16:07:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:07:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 20 [2022-03-15 16:07:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:57,368 INFO L225 Difference]: With dead ends: 799 [2022-03-15 16:07:57,368 INFO L226 Difference]: Without dead ends: 770 [2022-03-15 16:07:57,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1387, Invalid=5255, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:07:57,369 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 482 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:57,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 131 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1304 Invalid, 0 Unknown, 253 Unchecked, 0.7s Time] [2022-03-15 16:07:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-15 16:07:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 339. [2022-03-15 16:07:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0177514792899407) internal successors, (1020), 338 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-03-15 16:07:57,376 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 20 [2022-03-15 16:07:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:57,376 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-03-15 16:07:57,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-03-15 16:07:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:57,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:57,377 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] [2022-03-15 16:07:57,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 16:07:57,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:57,586 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash -967485590, now seen corresponding path program 7 times [2022-03-15 16:07:57,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:57,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655054386] [2022-03-15 16:07:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:57,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:57,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655054386] [2022-03-15 16:07:57,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655054386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:57,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747758297] [2022-03-15 16:07:57,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:07:57,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:57,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:57,672 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:57,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:07:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:57,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:57,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:07:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:57,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:57,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:57,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:07:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:57,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 3 [2022-03-15 16:07:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:57,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747758297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:57,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:57,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:07:57,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147571994] [2022-03-15 16:07:57,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:57,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:07:57,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:57,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:07:57,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:07:57,991 INFO L87 Difference]: Start difference. First operand 339 states and 1020 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:58,164 INFO L93 Difference]: Finished difference Result 409 states and 1221 transitions. [2022-03-15 16:07:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:07:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:58,166 INFO L225 Difference]: With dead ends: 409 [2022-03-15 16:07:58,166 INFO L226 Difference]: Without dead ends: 398 [2022-03-15 16:07:58,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:07:58,166 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:58,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 364 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-03-15 16:07:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-15 16:07:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 335. [2022-03-15 16:07:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0179640718562872) internal successors, (1008), 334 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1008 transitions. [2022-03-15 16:07:58,172 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1008 transitions. Word has length 20 [2022-03-15 16:07:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:58,172 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1008 transitions. [2022-03-15 16:07:58,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1008 transitions. [2022-03-15 16:07:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:58,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:58,173 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] [2022-03-15 16:07:58,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-15 16:07:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:58,387 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:58,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -20095859, now seen corresponding path program 1 times [2022-03-15 16:07:58,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:58,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363342175] [2022-03-15 16:07:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:58,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:58,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363342175] [2022-03-15 16:07:58,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363342175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:58,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435848282] [2022-03-15 16:07:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:58,496 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:58,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:07:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:07:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:58,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:07:58,694 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 16 treesize of output 10 [2022-03-15 16:07:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:58,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:58,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:58,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:07:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:07:58,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-15 16:07:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:58,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435848282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:07:58,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:07:58,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-15 16:07:58,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91305227] [2022-03-15 16:07:58,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:07:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:07:58,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:07:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:07:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:07:58,845 INFO L87 Difference]: Start difference. First operand 335 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:07:59,105 INFO L93 Difference]: Finished difference Result 435 states and 1270 transitions. [2022-03-15 16:07:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:07:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:07:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:07:59,107 INFO L225 Difference]: With dead ends: 435 [2022-03-15 16:07:59,107 INFO L226 Difference]: Without dead ends: 429 [2022-03-15 16:07:59,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:07:59,108 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:07:59,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 521 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-03-15 16:07:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-15 16:07:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 334. [2022-03-15 16:07:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.021021021021021) internal successors, (1006), 333 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2022-03-15 16:07:59,115 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2022-03-15 16:07:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:07:59,115 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2022-03-15 16:07:59,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:07:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2022-03-15 16:07:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:07:59,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:07:59,116 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] [2022-03-15 16:07:59,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:07:59,316 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,SelfDestructingSolverStorable35 [2022-03-15 16:07:59,316 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:07:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:07:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1330179178, now seen corresponding path program 8 times [2022-03-15 16:07:59,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:07:59,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061430411] [2022-03-15 16:07:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:07:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:07:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:07:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:59,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:07:59,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061430411] [2022-03-15 16:07:59,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061430411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:07:59,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262433845] [2022-03-15 16:07:59,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:07:59,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:07:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:07:59,439 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:07:59,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:07:59,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:07:59,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:07:59,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:07:59,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:07:59,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:59,608 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 15 treesize of output 19 [2022-03-15 16:07:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:07:59,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:07:59,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:07:59,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:08:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:00,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262433845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:00,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:00,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:08:00,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403544176] [2022-03-15 16:08:00,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:00,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:08:00,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:08:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:08:00,075 INFO L87 Difference]: Start difference. First operand 334 states and 1006 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:01,644 INFO L93 Difference]: Finished difference Result 660 states and 1862 transitions. [2022-03-15 16:08:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:08:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20 [2022-03-15 16:08:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:01,648 INFO L225 Difference]: With dead ends: 660 [2022-03-15 16:08:01,648 INFO L226 Difference]: Without dead ends: 633 [2022-03-15 16:08:01,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:08:01,649 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 293 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:01,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 109 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1132 Invalid, 0 Unknown, 736 Unchecked, 0.5s Time] [2022-03-15 16:08:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-15 16:08:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 327. [2022-03-15 16:08:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0092024539877302) internal successors, (981), 326 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 981 transitions. [2022-03-15 16:08:01,656 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 981 transitions. Word has length 20 [2022-03-15 16:08:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:01,656 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 981 transitions. [2022-03-15 16:08:01,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 981 transitions. [2022-03-15 16:08:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:01,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:01,657 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] [2022-03-15 16:08:01,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:01,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:08:01,879 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:01,880 INFO L85 PathProgramCache]: Analyzing trace with hash -353300289, now seen corresponding path program 9 times [2022-03-15 16:08:01,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:01,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338206088] [2022-03-15 16:08:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:01,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:01,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338206088] [2022-03-15 16:08:01,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338206088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:01,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080995322] [2022-03-15 16:08:01,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:01,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:01,957 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:01,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:08:01,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:01,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:01,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:02,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:02,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:02,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:02,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-15 16:08:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:02,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080995322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:02,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:02,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 16:08:02,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405651639] [2022-03-15 16:08:02,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:02,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:08:02,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:08:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:02,395 INFO L87 Difference]: Start difference. First operand 327 states and 981 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:02,803 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2022-03-15 16:08:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:08:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 20 [2022-03-15 16:08:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:02,805 INFO L225 Difference]: With dead ends: 450 [2022-03-15 16:08:02,805 INFO L226 Difference]: Without dead ends: 440 [2022-03-15 16:08:02,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:08:02,805 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:02,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 47 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 649 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-03-15 16:08:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-15 16:08:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-03-15 16:08:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0088757396449703) internal successors, (1017), 338 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1017 transitions. [2022-03-15 16:08:02,812 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1017 transitions. Word has length 20 [2022-03-15 16:08:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:02,812 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1017 transitions. [2022-03-15 16:08:02,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1017 transitions. [2022-03-15 16:08:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:02,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:02,813 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] [2022-03-15 16:08:02,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 16:08:03,027 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,SelfDestructingSolverStorable37 [2022-03-15 16:08:03,027 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 214268651, now seen corresponding path program 10 times [2022-03-15 16:08:03,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:03,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116904228] [2022-03-15 16:08:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:03,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:03,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116904228] [2022-03-15 16:08:03,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116904228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:03,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770543702] [2022-03-15 16:08:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:03,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:03,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:03,115 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:03,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:08:03,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:03,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:03,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:03,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:03,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:03,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:08:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:03,370 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-15 16:08:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:03,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770543702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:03,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:03,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:03,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562743891] [2022-03-15 16:08:03,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:03,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:03,401 INFO L87 Difference]: Start difference. First operand 339 states and 1017 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:03,596 INFO L93 Difference]: Finished difference Result 422 states and 1257 transitions. [2022-03-15 16:08:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:03,598 INFO L225 Difference]: With dead ends: 422 [2022-03-15 16:08:03,598 INFO L226 Difference]: Without dead ends: 411 [2022-03-15 16:08:03,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:03,599 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:03,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-15 16:08:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 336. [2022-03-15 16:08:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.008955223880597) internal successors, (1008), 335 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-03-15 16:08:03,605 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-03-15 16:08:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:03,605 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-03-15 16:08:03,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-03-15 16:08:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:03,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:03,606 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] [2022-03-15 16:08:03,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:03,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:08:03,828 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1590769142, now seen corresponding path program 9 times [2022-03-15 16:08:03,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:03,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343819756] [2022-03-15 16:08:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:03,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:03,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343819756] [2022-03-15 16:08:03,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343819756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:03,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937225760] [2022-03-15 16:08:03,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:03,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:03,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:03,909 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:03,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:08:03,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:03,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:03,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:04,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:04,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:04,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:04,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:04,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-15 16:08:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:04,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937225760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:04,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:04,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 16:08:04,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70713954] [2022-03-15 16:08:04,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:04,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:08:04,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:08:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:04,335 INFO L87 Difference]: Start difference. First operand 336 states and 1008 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:04,775 INFO L93 Difference]: Finished difference Result 436 states and 1291 transitions. [2022-03-15 16:08:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:08:04,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:04,777 INFO L225 Difference]: With dead ends: 436 [2022-03-15 16:08:04,777 INFO L226 Difference]: Without dead ends: 427 [2022-03-15 16:08:04,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:08:04,778 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:04,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 54 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 720 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-03-15 16:08:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-15 16:08:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 339. [2022-03-15 16:08:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2022-03-15 16:08:04,783 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 20 [2022-03-15 16:08:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:04,784 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2022-03-15 16:08:04,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2022-03-15 16:08:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:04,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:04,784 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] [2022-03-15 16:08:04,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:08:04,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:08:04,985 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:04,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1635909478, now seen corresponding path program 10 times [2022-03-15 16:08:04,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:04,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435159465] [2022-03-15 16:08:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:04,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:05,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:05,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435159465] [2022-03-15 16:08:05,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435159465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:05,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616466768] [2022-03-15 16:08:05,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:05,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:05,072 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:05,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:08:05,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:05,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:05,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:05,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:05,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:05,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:05,386 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 15 treesize of output 20 [2022-03-15 16:08:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:05,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:05,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616466768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:05,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:05,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:05,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091636484] [2022-03-15 16:08:05,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:05,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:05,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:05,429 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:05,643 INFO L93 Difference]: Finished difference Result 413 states and 1233 transitions. [2022-03-15 16:08:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:05,645 INFO L225 Difference]: With dead ends: 413 [2022-03-15 16:08:05,645 INFO L226 Difference]: Without dead ends: 402 [2022-03-15 16:08:05,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:05,646 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:05,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-03-15 16:08:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 336. [2022-03-15 16:08:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.008955223880597) internal successors, (1008), 335 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-03-15 16:08:05,652 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-03-15 16:08:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:05,652 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-03-15 16:08:05,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-03-15 16:08:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:05,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:05,653 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] [2022-03-15 16:08:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:05,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:05,874 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -805583803, now seen corresponding path program 11 times [2022-03-15 16:08:05,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:05,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22383285] [2022-03-15 16:08:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:05,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:05,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22383285] [2022-03-15 16:08:05,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22383285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:05,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645288702] [2022-03-15 16:08:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:05,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:05,972 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:08:05,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:06,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:06,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:06,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:06,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:08:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:06,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:06,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645288702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:06,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:06,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:06,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633386882] [2022-03-15 16:08:06,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:06,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:06,294 INFO L87 Difference]: Start difference. First operand 336 states and 1008 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:06,539 INFO L93 Difference]: Finished difference Result 439 states and 1300 transitions. [2022-03-15 16:08:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:06,541 INFO L225 Difference]: With dead ends: 439 [2022-03-15 16:08:06,541 INFO L226 Difference]: Without dead ends: 428 [2022-03-15 16:08:06,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:06,542 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:06,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 32 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-15 16:08:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 339. [2022-03-15 16:08:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-03-15 16:08:06,548 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-03-15 16:08:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:06,548 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-03-15 16:08:06,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-03-15 16:08:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:06,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:06,548 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] [2022-03-15 16:08:06,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 16:08:06,749 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,SelfDestructingSolverStorable41 [2022-03-15 16:08:06,749 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -881419218, now seen corresponding path program 11 times [2022-03-15 16:08:06,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:06,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427290842] [2022-03-15 16:08:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:06,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:06,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427290842] [2022-03-15 16:08:06,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427290842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:06,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214817050] [2022-03-15 16:08:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:06,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:06,840 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:08:06,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:06,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:06,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:06,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:06,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:06,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-15 16:08:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:07,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:07,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:07,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:08:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:07,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:07,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214817050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:07,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:07,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:07,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035820241] [2022-03-15 16:08:07,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:07,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:07,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:07,136 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:07,405 INFO L93 Difference]: Finished difference Result 429 states and 1275 transitions. [2022-03-15 16:08:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:07,407 INFO L225 Difference]: With dead ends: 429 [2022-03-15 16:08:07,407 INFO L226 Difference]: Without dead ends: 418 [2022-03-15 16:08:07,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:07,407 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:07,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-15 16:08:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 339. [2022-03-15 16:08:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.997041420118343) internal successors, (1013), 338 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-03-15 16:08:07,415 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-03-15 16:08:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:07,416 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-03-15 16:08:07,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-03-15 16:08:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:07,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:07,417 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] [2022-03-15 16:08:07,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 16:08:07,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:07,635 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:07,636 INFO L85 PathProgramCache]: Analyzing trace with hash -136538836, now seen corresponding path program 12 times [2022-03-15 16:08:07,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:07,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842787010] [2022-03-15 16:08:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:07,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:07,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:07,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842787010] [2022-03-15 16:08:07,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842787010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:07,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722570741] [2022-03-15 16:08:07,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:07,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:07,729 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:08:07,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:08:07,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:07,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:07,920 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 15 treesize of output 19 [2022-03-15 16:08:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:07,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:08,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:08,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-15 16:08:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:08,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722570741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:08,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:08,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:08:08,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200728293] [2022-03-15 16:08:08,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:08,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:08:08,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:08,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:08:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:08:08,385 INFO L87 Difference]: Start difference. First operand 339 states and 1013 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:10,671 INFO L93 Difference]: Finished difference Result 981 states and 2663 transitions. [2022-03-15 16:08:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:08:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20 [2022-03-15 16:08:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:10,675 INFO L225 Difference]: With dead ends: 981 [2022-03-15 16:08:10,675 INFO L226 Difference]: Without dead ends: 975 [2022-03-15 16:08:10,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=814, Invalid=5038, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:08:10,677 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 349 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1809 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:10,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 147 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1148 Invalid, 0 Unknown, 1809 Unchecked, 0.5s Time] [2022-03-15 16:08:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-15 16:08:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 358. [2022-03-15 16:08:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.988795518207283) internal successors, (1067), 357 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1067 transitions. [2022-03-15 16:08:10,686 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1067 transitions. Word has length 20 [2022-03-15 16:08:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1067 transitions. [2022-03-15 16:08:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1067 transitions. [2022-03-15 16:08:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:10,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:10,687 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] [2022-03-15 16:08:10,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 16:08:10,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:10,902 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -62802732, now seen corresponding path program 13 times [2022-03-15 16:08:10,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:10,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891569255] [2022-03-15 16:08:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:11,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:11,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891569255] [2022-03-15 16:08:11,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891569255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:11,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91269392] [2022-03-15 16:08:11,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:11,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:11,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:11,008 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:11,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:08:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:11,189 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 16 treesize of output 10 [2022-03-15 16:08:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:11,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:11,318 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 11 treesize of output 16 [2022-03-15 16:08:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:11,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:08:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:11,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91269392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:11,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:11,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-15 16:08:11,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451098941] [2022-03-15 16:08:11,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:11,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:08:11,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:08:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:08:11,352 INFO L87 Difference]: Start difference. First operand 358 states and 1067 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:11,697 INFO L93 Difference]: Finished difference Result 602 states and 1749 transitions. [2022-03-15 16:08:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:08:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:11,699 INFO L225 Difference]: With dead ends: 602 [2022-03-15 16:08:11,699 INFO L226 Difference]: Without dead ends: 593 [2022-03-15 16:08:11,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:11,700 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:11,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 66 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 666 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-03-15 16:08:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-15 16:08:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 351. [2022-03-15 16:08:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.98) internal successors, (1043), 350 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1043 transitions. [2022-03-15 16:08:11,706 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1043 transitions. Word has length 20 [2022-03-15 16:08:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:11,706 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1043 transitions. [2022-03-15 16:08:11,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1043 transitions. [2022-03-15 16:08:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:11,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:11,707 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] [2022-03-15 16:08:11,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:11,923 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,SelfDestructingSolverStorable44 [2022-03-15 16:08:11,923 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2099652405, now seen corresponding path program 12 times [2022-03-15 16:08:11,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:11,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397586519] [2022-03-15 16:08:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:11,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:12,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:12,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397586519] [2022-03-15 16:08:12,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397586519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:12,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113929533] [2022-03-15 16:08:12,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:12,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:12,031 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:12,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:08:12,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:08:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:12,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:12,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:12,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:12,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:12,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:08:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:12,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113929533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:12,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:12,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:08:12,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162882414] [2022-03-15 16:08:12,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:12,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:08:12,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:08:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:08:12,693 INFO L87 Difference]: Start difference. First operand 351 states and 1043 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:13,767 INFO L93 Difference]: Finished difference Result 587 states and 1698 transitions. [2022-03-15 16:08:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:08:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:13,768 INFO L225 Difference]: With dead ends: 587 [2022-03-15 16:08:13,768 INFO L226 Difference]: Without dead ends: 558 [2022-03-15 16:08:13,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:08:13,769 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:13,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 104 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 984 Invalid, 0 Unknown, 728 Unchecked, 0.4s Time] [2022-03-15 16:08:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-15 16:08:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2022-03-15 16:08:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2022-03-15 16:08:13,774 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 20 [2022-03-15 16:08:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:13,775 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2022-03-15 16:08:13,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2022-03-15 16:08:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:13,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:13,775 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] [2022-03-15 16:08:13,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:08:13,976 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,SelfDestructingSolverStorable45 [2022-03-15 16:08:13,976 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1481560959, now seen corresponding path program 13 times [2022-03-15 16:08:13,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:13,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964256393] [2022-03-15 16:08:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:14,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:14,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964256393] [2022-03-15 16:08:14,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964256393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:14,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303610377] [2022-03-15 16:08:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:14,059 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:14,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:08:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:14,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:14,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:14,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:14,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:14,316 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 15 treesize of output 20 [2022-03-15 16:08:14,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:14,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:14,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303610377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:14,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:14,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:14,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603001919] [2022-03-15 16:08:14,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:14,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:14,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:14,350 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:14,669 INFO L93 Difference]: Finished difference Result 457 states and 1351 transitions. [2022-03-15 16:08:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:08:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:14,670 INFO L225 Difference]: With dead ends: 457 [2022-03-15 16:08:14,670 INFO L226 Difference]: Without dead ends: 447 [2022-03-15 16:08:14,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:08:14,671 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:14,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:08:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-15 16:08:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 363. [2022-03-15 16:08:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0) internal successors, (1086), 362 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-03-15 16:08:14,678 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-03-15 16:08:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:14,678 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-03-15 16:08:14,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-03-15 16:08:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:14,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:14,679 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] [2022-03-15 16:08:14,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:14,895 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,SelfDestructingSolverStorable46 [2022-03-15 16:08:14,895 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1979667897, now seen corresponding path program 14 times [2022-03-15 16:08:14,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:14,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445866993] [2022-03-15 16:08:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:14,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:14,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445866993] [2022-03-15 16:08:14,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445866993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:14,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845575351] [2022-03-15 16:08:14,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:14,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:14,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:14,979 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:14,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:08:15,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:15,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:15,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:15,098 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 [2022-03-15 16:08:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:15,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:15,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:15,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:08:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:15,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845575351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:15,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:15,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:08:15,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343494492] [2022-03-15 16:08:15,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:15,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:08:15,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:08:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:08:15,573 INFO L87 Difference]: Start difference. First operand 363 states and 1086 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:17,557 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-03-15 16:08:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:08:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:17,559 INFO L225 Difference]: With dead ends: 663 [2022-03-15 16:08:17,559 INFO L226 Difference]: Without dead ends: 631 [2022-03-15 16:08:17,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:08:17,560 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:17,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 112 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1484 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2022-03-15 16:08:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-03-15 16:08:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 363. [2022-03-15 16:08:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0) internal successors, (1086), 362 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-03-15 16:08:17,567 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-03-15 16:08:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:17,567 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-03-15 16:08:17,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-03-15 16:08:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:17,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:17,568 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] [2022-03-15 16:08:17,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:17,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:17,768 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2061801888, now seen corresponding path program 14 times [2022-03-15 16:08:17,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:17,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625063547] [2022-03-15 16:08:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:17,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:17,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625063547] [2022-03-15 16:08:17,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625063547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:17,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615135640] [2022-03-15 16:08:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:17,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:17,880 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:17,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:08:17,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:18,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:18,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:18,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:18,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:18,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:08:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:18,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615135640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:18,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:18,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-15 16:08:18,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666570377] [2022-03-15 16:08:18,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:18,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:08:18,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:08:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:08:18,519 INFO L87 Difference]: Start difference. First operand 363 states and 1086 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:19,697 INFO L93 Difference]: Finished difference Result 593 states and 1695 transitions. [2022-03-15 16:08:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:08:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:19,699 INFO L225 Difference]: With dead ends: 593 [2022-03-15 16:08:19,699 INFO L226 Difference]: Without dead ends: 562 [2022-03-15 16:08:19,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:08:19,699 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:19,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 112 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1018 Invalid, 0 Unknown, 338 Unchecked, 0.4s Time] [2022-03-15 16:08:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-03-15 16:08:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 373. [2022-03-15 16:08:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0188172043010755) internal successors, (1123), 372 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1123 transitions. [2022-03-15 16:08:19,705 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1123 transitions. Word has length 20 [2022-03-15 16:08:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:19,705 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1123 transitions. [2022-03-15 16:08:19,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1123 transitions. [2022-03-15 16:08:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:19,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:19,706 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] [2022-03-15 16:08:19,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:08:19,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:08:19,906 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 175206200, now seen corresponding path program 15 times [2022-03-15 16:08:19,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:19,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278787942] [2022-03-15 16:08:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:19,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:19,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278787942] [2022-03-15 16:08:19,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278787942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:19,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371190075] [2022-03-15 16:08:19,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:19,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:19,996 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:19,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:08:20,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:08:20,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:20,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:20,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:20,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:20,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:20,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-15 16:08:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:20,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371190075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:20,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:20,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:08:20,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112136323] [2022-03-15 16:08:20,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:20,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:08:20,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:08:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:08:20,578 INFO L87 Difference]: Start difference. First operand 373 states and 1123 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:22,084 INFO L93 Difference]: Finished difference Result 610 states and 1761 transitions. [2022-03-15 16:08:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:08:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:22,085 INFO L225 Difference]: With dead ends: 610 [2022-03-15 16:08:22,085 INFO L226 Difference]: Without dead ends: 583 [2022-03-15 16:08:22,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=539, Invalid=2011, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:08:22,086 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 285 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:22,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 71 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 871 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-03-15 16:08:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-15 16:08:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 376. [2022-03-15 16:08:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.021333333333333) internal successors, (1133), 375 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1133 transitions. [2022-03-15 16:08:22,093 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1133 transitions. Word has length 20 [2022-03-15 16:08:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:22,093 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1133 transitions. [2022-03-15 16:08:22,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1133 transitions. [2022-03-15 16:08:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:22,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:22,094 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] [2022-03-15 16:08:22,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:08:22,315 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,SelfDestructingSolverStorable49 [2022-03-15 16:08:22,315 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1243494876, now seen corresponding path program 16 times [2022-03-15 16:08:22,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:22,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400217088] [2022-03-15 16:08:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:22,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:22,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400217088] [2022-03-15 16:08:22,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400217088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:22,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002515128] [2022-03-15 16:08:22,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:22,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:22,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:22,402 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:22,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:08:22,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:22,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:22,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:08:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:22,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:22,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:22,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:08:22,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:22,697 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-15 16:08:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:22,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002515128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:22,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:22,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:22,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624206980] [2022-03-15 16:08:22,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:22,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:22,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:22,726 INFO L87 Difference]: Start difference. First operand 376 states and 1133 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:23,007 INFO L93 Difference]: Finished difference Result 457 states and 1362 transitions. [2022-03-15 16:08:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:08:23,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:23,008 INFO L225 Difference]: With dead ends: 457 [2022-03-15 16:08:23,008 INFO L226 Difference]: Without dead ends: 446 [2022-03-15 16:08:23,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:08:23,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:23,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-03-15 16:08:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 371. [2022-03-15 16:08:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.018918918918919) internal successors, (1117), 370 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1117 transitions. [2022-03-15 16:08:23,014 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1117 transitions. Word has length 20 [2022-03-15 16:08:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:23,014 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1117 transitions. [2022-03-15 16:08:23,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1117 transitions. [2022-03-15 16:08:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:23,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:23,015 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] [2022-03-15 16:08:23,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:08:23,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:23,215 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1857680177, now seen corresponding path program 15 times [2022-03-15 16:08:23,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:23,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818086415] [2022-03-15 16:08:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:23,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:23,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818086415] [2022-03-15 16:08:23,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818086415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:23,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644663535] [2022-03-15 16:08:23,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:23,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:23,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:23,301 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:23,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:08:23,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:23,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:23,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:23,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:23,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:23,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-15 16:08:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:23,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644663535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:23,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:23,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-15 16:08:23,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459958100] [2022-03-15 16:08:23,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:23,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:08:23,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:08:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:08:23,794 INFO L87 Difference]: Start difference. First operand 371 states and 1117 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:24,182 INFO L93 Difference]: Finished difference Result 520 states and 1540 transitions. [2022-03-15 16:08:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:08:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:24,183 INFO L225 Difference]: With dead ends: 520 [2022-03-15 16:08:24,183 INFO L226 Difference]: Without dead ends: 511 [2022-03-15 16:08:24,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:08:24,184 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:24,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 420 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-03-15 16:08:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-15 16:08:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 378. [2022-03-15 16:08:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.018567639257294) internal successors, (1138), 377 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-03-15 16:08:24,191 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-03-15 16:08:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:24,191 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-03-15 16:08:24,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-03-15 16:08:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:24,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:24,192 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] [2022-03-15 16:08:24,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:24,407 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,SelfDestructingSolverStorable51 [2022-03-15 16:08:24,407 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1869718179, now seen corresponding path program 16 times [2022-03-15 16:08:24,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:24,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958409472] [2022-03-15 16:08:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:24,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:24,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:24,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958409472] [2022-03-15 16:08:24,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958409472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:24,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927003621] [2022-03-15 16:08:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:24,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:24,485 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:24,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:08:24,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:24,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:24,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:24,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:24,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 20 [2022-03-15 16:08:24,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:24,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:24,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927003621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:24,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:24,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:24,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428921016] [2022-03-15 16:08:24,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:24,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:24,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:24,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:24,771 INFO L87 Difference]: Start difference. First operand 378 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:24,953 INFO L93 Difference]: Finished difference Result 458 states and 1362 transitions. [2022-03-15 16:08:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:08:24,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:24,954 INFO L225 Difference]: With dead ends: 458 [2022-03-15 16:08:24,954 INFO L226 Difference]: Without dead ends: 448 [2022-03-15 16:08:24,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:24,954 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:24,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-03-15 16:08:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-03-15 16:08:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 378. [2022-03-15 16:08:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.018567639257294) internal successors, (1138), 377 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-03-15 16:08:24,961 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-03-15 16:08:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:24,962 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-03-15 16:08:24,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:24,962 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-03-15 16:08:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:24,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:24,963 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] [2022-03-15 16:08:24,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:25,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:25,167 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -493217688, now seen corresponding path program 17 times [2022-03-15 16:08:25,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:25,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064583698] [2022-03-15 16:08:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:25,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:25,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:25,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064583698] [2022-03-15 16:08:25,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064583698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:25,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406364391] [2022-03-15 16:08:25,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:25,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:25,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:25,239 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:25,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:08:25,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:25,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:25,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:25,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:08:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:25,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:25,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:25,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:08:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:25,504 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 15 treesize of output 3 [2022-03-15 16:08:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:25,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406364391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:25,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:25,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:25,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528194096] [2022-03-15 16:08:25,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:25,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:25,530 INFO L87 Difference]: Start difference. First operand 378 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:25,707 INFO L93 Difference]: Finished difference Result 466 states and 1385 transitions. [2022-03-15 16:08:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:08:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:25,709 INFO L225 Difference]: With dead ends: 466 [2022-03-15 16:08:25,709 INFO L226 Difference]: Without dead ends: 457 [2022-03-15 16:08:25,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:25,709 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:25,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 36 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-03-15 16:08:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-15 16:08:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 381. [2022-03-15 16:08:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.0210526315789474) internal successors, (1148), 380 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1148 transitions. [2022-03-15 16:08:25,721 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1148 transitions. Word has length 20 [2022-03-15 16:08:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:25,721 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1148 transitions. [2022-03-15 16:08:25,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1148 transitions. [2022-03-15 16:08:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:25,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:25,721 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] [2022-03-15 16:08:25,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:08:25,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:25,922 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash 575070988, now seen corresponding path program 18 times [2022-03-15 16:08:25,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:25,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607484252] [2022-03-15 16:08:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:25,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:25,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607484252] [2022-03-15 16:08:25,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607484252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:25,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624123307] [2022-03-15 16:08:25,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:25,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:25,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:25,997 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:25,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:08:26,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:08:26,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:08:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:26,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:26,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:26,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:26,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:26,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-15 16:08:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:26,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624123307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:26,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:26,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-15 16:08:26,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428319619] [2022-03-15 16:08:26,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:26,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:26,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:26,447 INFO L87 Difference]: Start difference. First operand 381 states and 1148 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:27,799 INFO L93 Difference]: Finished difference Result 665 states and 1934 transitions. [2022-03-15 16:08:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:08:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20 [2022-03-15 16:08:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:27,801 INFO L225 Difference]: With dead ends: 665 [2022-03-15 16:08:27,801 INFO L226 Difference]: Without dead ends: 641 [2022-03-15 16:08:27,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=1816, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:08:27,807 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 230 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:27,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 86 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:08:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-03-15 16:08:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 392. [2022-03-15 16:08:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.040920716112532) internal successors, (1189), 391 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1189 transitions. [2022-03-15 16:08:27,816 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1189 transitions. Word has length 20 [2022-03-15 16:08:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:27,816 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1189 transitions. [2022-03-15 16:08:27,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1189 transitions. [2022-03-15 16:08:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:27,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:27,817 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] [2022-03-15 16:08:27,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:28,038 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,SelfDestructingSolverStorable54 [2022-03-15 16:08:28,038 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1405396663, now seen corresponding path program 17 times [2022-03-15 16:08:28,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:28,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653979445] [2022-03-15 16:08:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:28,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:28,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653979445] [2022-03-15 16:08:28,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653979445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:28,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330515704] [2022-03-15 16:08:28,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:28,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:28,129 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:28,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:08:28,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:28,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:28,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:28,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:28,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:08:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:28,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:28,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:28,404 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 15 treesize of output 20 [2022-03-15 16:08:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:28,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:28,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330515704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:28,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:28,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:28,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813343736] [2022-03-15 16:08:28,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:28,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:28,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:28,444 INFO L87 Difference]: Start difference. First operand 392 states and 1189 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:28,626 INFO L93 Difference]: Finished difference Result 487 states and 1457 transitions. [2022-03-15 16:08:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:08:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:28,628 INFO L225 Difference]: With dead ends: 487 [2022-03-15 16:08:28,628 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 16:08:28,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:08:28,628 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:28,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 33 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 336 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-03-15 16:08:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 16:08:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 398. [2022-03-15 16:08:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.0352644836272042) internal successors, (1205), 397 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1205 transitions. [2022-03-15 16:08:28,636 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1205 transitions. Word has length 20 [2022-03-15 16:08:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:28,636 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1205 transitions. [2022-03-15 16:08:28,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1205 transitions. [2022-03-15 16:08:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:28,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:28,637 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] [2022-03-15 16:08:28,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:28,859 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,SelfDestructingSolverStorable55 [2022-03-15 16:08:28,859 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1329561248, now seen corresponding path program 19 times [2022-03-15 16:08:28,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:28,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725801200] [2022-03-15 16:08:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:28,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:28,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:28,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725801200] [2022-03-15 16:08:28,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725801200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:28,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085057860] [2022-03-15 16:08:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:28,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:28,949 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:28,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:08:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:29,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:29,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:08:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:29,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:29,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:29,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-15 16:08:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:29,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 3 [2022-03-15 16:08:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:29,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085057860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:29,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:29,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:29,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215669880] [2022-03-15 16:08:29,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:29,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:29,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:29,325 INFO L87 Difference]: Start difference. First operand 398 states and 1205 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:29,560 INFO L93 Difference]: Finished difference Result 469 states and 1405 transitions. [2022-03-15 16:08:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:08:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:29,561 INFO L225 Difference]: With dead ends: 469 [2022-03-15 16:08:29,561 INFO L226 Difference]: Without dead ends: 458 [2022-03-15 16:08:29,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:08:29,561 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:29,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-15 16:08:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-15 16:08:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 399. [2022-03-15 16:08:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0376884422110555) internal successors, (1209), 398 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1209 transitions. [2022-03-15 16:08:29,567 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1209 transitions. Word has length 20 [2022-03-15 16:08:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:29,567 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1209 transitions. [2022-03-15 16:08:29,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1209 transitions. [2022-03-15 16:08:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:29,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:29,568 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] [2022-03-15 16:08:29,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:08:29,768 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,SelfDestructingSolverStorable56 [2022-03-15 16:08:29,768 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash 705118312, now seen corresponding path program 20 times [2022-03-15 16:08:29,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:29,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468976183] [2022-03-15 16:08:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:29,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:29,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:29,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468976183] [2022-03-15 16:08:29,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468976183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:29,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652075453] [2022-03-15 16:08:29,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:29,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:29,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:29,860 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:29,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:08:29,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:30,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:30,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 18 [2022-03-15 16:08:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:30,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:30,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:30,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-15 16:08:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:30,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652075453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:30,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:30,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 16:08:30,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305719342] [2022-03-15 16:08:30,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:30,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:30,502 INFO L87 Difference]: Start difference. First operand 399 states and 1209 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:31,288 INFO L93 Difference]: Finished difference Result 663 states and 1893 transitions. [2022-03-15 16:08:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:08:31,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:31,289 INFO L225 Difference]: With dead ends: 663 [2022-03-15 16:08:31,289 INFO L226 Difference]: Without dead ends: 610 [2022-03-15 16:08:31,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:08:31,290 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:31,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 80 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 822 Invalid, 0 Unknown, 322 Unchecked, 0.3s Time] [2022-03-15 16:08:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-15 16:08:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 400. [2022-03-15 16:08:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0426065162907268) internal successors, (1214), 399 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1214 transitions. [2022-03-15 16:08:31,297 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1214 transitions. Word has length 20 [2022-03-15 16:08:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:31,297 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1214 transitions. [2022-03-15 16:08:31,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1214 transitions. [2022-03-15 16:08:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:31,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:31,298 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] [2022-03-15 16:08:31,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 16:08:31,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:31,520 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -422673061, now seen corresponding path program 18 times [2022-03-15 16:08:31,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:31,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410677329] [2022-03-15 16:08:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:31,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:31,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410677329] [2022-03-15 16:08:31,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410677329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:31,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966297985] [2022-03-15 16:08:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:31,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:31,604 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:31,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:08:31,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:08:31,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:31,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:31,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:31,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:32,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:32,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-15 16:08:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:32,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966297985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:32,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:32,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-15 16:08:32,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957914057] [2022-03-15 16:08:32,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:32,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:32,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:32,200 INFO L87 Difference]: Start difference. First operand 400 states and 1214 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:34,263 INFO L93 Difference]: Finished difference Result 835 states and 2438 transitions. [2022-03-15 16:08:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:08:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20 [2022-03-15 16:08:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:34,265 INFO L225 Difference]: With dead ends: 835 [2022-03-15 16:08:34,265 INFO L226 Difference]: Without dead ends: 806 [2022-03-15 16:08:34,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=690, Invalid=3216, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:08:34,265 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:34,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 89 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:08:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-15 16:08:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 401. [2022-03-15 16:08:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0425) internal successors, (1217), 400 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1217 transitions. [2022-03-15 16:08:34,275 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1217 transitions. Word has length 20 [2022-03-15 16:08:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:34,275 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1217 transitions. [2022-03-15 16:08:34,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1217 transitions. [2022-03-15 16:08:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:34,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:34,276 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] [2022-03-15 16:08:34,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:34,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 16:08:34,497 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash -856702407, now seen corresponding path program 19 times [2022-03-15 16:08:34,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:34,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996379558] [2022-03-15 16:08:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:34,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:34,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:34,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996379558] [2022-03-15 16:08:34,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996379558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:34,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029068503] [2022-03-15 16:08:34,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:34,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:34,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:34,574 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:34,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:08:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:34,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:34,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:08:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:34,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:34,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:34,811 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 15 treesize of output 20 [2022-03-15 16:08:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:34,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 3 [2022-03-15 16:08:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:34,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029068503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:34,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:34,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:08:34,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705974487] [2022-03-15 16:08:34,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:34,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:08:34,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:08:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:34,839 INFO L87 Difference]: Start difference. First operand 401 states and 1217 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:35,045 INFO L93 Difference]: Finished difference Result 506 states and 1512 transitions. [2022-03-15 16:08:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:08:35,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:35,046 INFO L225 Difference]: With dead ends: 506 [2022-03-15 16:08:35,046 INFO L226 Difference]: Without dead ends: 495 [2022-03-15 16:08:35,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:35,047 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:35,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-03-15 16:08:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-15 16:08:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 396. [2022-03-15 16:08:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0405063291139243) internal successors, (1201), 395 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1201 transitions. [2022-03-15 16:08:35,055 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1201 transitions. Word has length 20 [2022-03-15 16:08:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:35,055 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1201 transitions. [2022-03-15 16:08:35,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1201 transitions. [2022-03-15 16:08:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:35,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:35,056 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] [2022-03-15 16:08:35,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:35,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:08:35,276 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1388007308, now seen corresponding path program 21 times [2022-03-15 16:08:35,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:35,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033010215] [2022-03-15 16:08:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:35,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:35,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033010215] [2022-03-15 16:08:35,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033010215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:35,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570636794] [2022-03-15 16:08:35,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:35,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:35,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:35,354 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:35,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:08:35,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:35,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:35,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:35,491 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-15 16:08:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:35,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:35,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:35,784 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 27 treesize of output 26 [2022-03-15 16:08:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:35,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570636794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:35,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:35,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-15 16:08:35,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408963596] [2022-03-15 16:08:35,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:35,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 16:08:35,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 16:08:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:08:35,870 INFO L87 Difference]: Start difference. First operand 396 states and 1201 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:36,278 INFO L93 Difference]: Finished difference Result 552 states and 1638 transitions. [2022-03-15 16:08:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:08:36,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:36,280 INFO L225 Difference]: With dead ends: 552 [2022-03-15 16:08:36,280 INFO L226 Difference]: Without dead ends: 543 [2022-03-15 16:08:36,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:08:36,280 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:36,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 46 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 488 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-15 16:08:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-15 16:08:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 393. [2022-03-15 16:08:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.0331632653061225) internal successors, (1189), 392 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1189 transitions. [2022-03-15 16:08:36,286 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1189 transitions. Word has length 20 [2022-03-15 16:08:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:36,287 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1189 transitions. [2022-03-15 16:08:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1189 transitions. [2022-03-15 16:08:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:36,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:36,287 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] [2022-03-15 16:08:36,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:36,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:36,488 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 377918803, now seen corresponding path program 20 times [2022-03-15 16:08:36,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:36,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677297312] [2022-03-15 16:08:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:36,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:36,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677297312] [2022-03-15 16:08:36,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677297312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:36,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127932261] [2022-03-15 16:08:36,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:36,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:36,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:36,561 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:36,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:08:36,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:36,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:36,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:36,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:36,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:36,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:08:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:36,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:36,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127932261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:36,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:36,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:36,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728021225] [2022-03-15 16:08:36,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:36,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:36,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:36,848 INFO L87 Difference]: Start difference. First operand 393 states and 1189 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:37,158 INFO L93 Difference]: Finished difference Result 540 states and 1607 transitions. [2022-03-15 16:08:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:37,160 INFO L225 Difference]: With dead ends: 540 [2022-03-15 16:08:37,160 INFO L226 Difference]: Without dead ends: 530 [2022-03-15 16:08:37,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:37,160 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:37,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 68 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 655 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-15 16:08:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-03-15 16:08:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 396. [2022-03-15 16:08:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.027848101265823) internal successors, (1196), 395 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1196 transitions. [2022-03-15 16:08:37,171 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1196 transitions. Word has length 20 [2022-03-15 16:08:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:37,171 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1196 transitions. [2022-03-15 16:08:37,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1196 transitions. [2022-03-15 16:08:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:37,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:37,172 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] [2022-03-15 16:08:37,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:37,372 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,SelfDestructingSolverStorable61 [2022-03-15 16:08:37,372 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1374169437, now seen corresponding path program 21 times [2022-03-15 16:08:37,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:37,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005861380] [2022-03-15 16:08:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:37,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:37,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:37,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005861380] [2022-03-15 16:08:37,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005861380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:37,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241399078] [2022-03-15 16:08:37,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:37,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:37,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:37,455 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:37,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:08:37,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:37,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:37,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:37,589 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 11 treesize of output 15 [2022-03-15 16:08:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:37,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:37,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:37,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-15 16:08:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:38,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241399078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:38,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:38,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 16:08:38,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752429125] [2022-03-15 16:08:38,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:38,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:08:38,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:08:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:38,007 INFO L87 Difference]: Start difference. First operand 396 states and 1196 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:38,583 INFO L93 Difference]: Finished difference Result 576 states and 1697 transitions. [2022-03-15 16:08:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:08:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 20 [2022-03-15 16:08:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:38,585 INFO L225 Difference]: With dead ends: 576 [2022-03-15 16:08:38,585 INFO L226 Difference]: Without dead ends: 565 [2022-03-15 16:08:38,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:08:38,585 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:38,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 880 Invalid, 0 Unknown, 332 Unchecked, 0.3s Time] [2022-03-15 16:08:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-15 16:08:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 399. [2022-03-15 16:08:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.027638190954774) internal successors, (1205), 398 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1205 transitions. [2022-03-15 16:08:38,593 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1205 transitions. Word has length 20 [2022-03-15 16:08:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:38,593 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1205 transitions. [2022-03-15 16:08:38,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1205 transitions. [2022-03-15 16:08:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:38,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:38,595 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] [2022-03-15 16:08:38,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 16:08:38,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:38,807 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 646299815, now seen corresponding path program 22 times [2022-03-15 16:08:38,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:38,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073902161] [2022-03-15 16:08:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:38,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:38,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073902161] [2022-03-15 16:08:38,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073902161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:38,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789172861] [2022-03-15 16:08:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:38,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:38,890 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:38,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:08:38,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:38,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:38,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:38,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:39,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:39,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:39,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:39,215 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 11 treesize of output 16 [2022-03-15 16:08:39,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:39,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:39,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789172861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:39,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:39,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:39,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430239455] [2022-03-15 16:08:39,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:39,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:39,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:39,236 INFO L87 Difference]: Start difference. First operand 399 states and 1205 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:39,550 INFO L93 Difference]: Finished difference Result 558 states and 1655 transitions. [2022-03-15 16:08:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 20 [2022-03-15 16:08:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:39,553 INFO L225 Difference]: With dead ends: 558 [2022-03-15 16:08:39,553 INFO L226 Difference]: Without dead ends: 549 [2022-03-15 16:08:39,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:39,553 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:39,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 68 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 703 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-15 16:08:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-15 16:08:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 397. [2022-03-15 16:08:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0277777777777777) internal successors, (1199), 396 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-03-15 16:08:39,562 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-03-15 16:08:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:39,562 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-03-15 16:08:39,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-03-15 16:08:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:39,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:39,563 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] [2022-03-15 16:08:39,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 16:08:39,783 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,SelfDestructingSolverStorable63 [2022-03-15 16:08:39,783 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1704598050, now seen corresponding path program 22 times [2022-03-15 16:08:39,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:39,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943986743] [2022-03-15 16:08:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:39,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:39,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:39,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943986743] [2022-03-15 16:08:39,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943986743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:39,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373054925] [2022-03-15 16:08:39,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:39,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:39,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:39,862 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:39,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:08:39,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:39,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:39,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:39,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:39,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:08:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:40,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:40,161 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 11 treesize of output 16 [2022-03-15 16:08:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:40,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373054925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:40,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:40,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:40,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652364021] [2022-03-15 16:08:40,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:40,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:40,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:40,176 INFO L87 Difference]: Start difference. First operand 397 states and 1199 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:40,493 INFO L93 Difference]: Finished difference Result 523 states and 1556 transitions. [2022-03-15 16:08:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:40,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 20 [2022-03-15 16:08:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:40,494 INFO L225 Difference]: With dead ends: 523 [2022-03-15 16:08:40,494 INFO L226 Difference]: Without dead ends: 514 [2022-03-15 16:08:40,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:40,494 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:40,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 73 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 718 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-03-15 16:08:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-15 16:08:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 400. [2022-03-15 16:08:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.030075187969925) internal successors, (1209), 399 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1209 transitions. [2022-03-15 16:08:40,501 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1209 transitions. Word has length 20 [2022-03-15 16:08:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:40,502 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1209 transitions. [2022-03-15 16:08:40,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1209 transitions. [2022-03-15 16:08:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:40,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:40,502 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] [2022-03-15 16:08:40,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:40,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:40,703 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash -636309374, now seen corresponding path program 23 times [2022-03-15 16:08:40,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:40,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291435198] [2022-03-15 16:08:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:40,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291435198] [2022-03-15 16:08:40,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291435198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:40,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748757035] [2022-03-15 16:08:40,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:40,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:40,772 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:40,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:08:40,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:40,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-03-15 16:08:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:41,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:41,058 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-15 16:08:41,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:41,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748757035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:41,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:41,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:41,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323541145] [2022-03-15 16:08:41,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:41,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:41,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:41,073 INFO L87 Difference]: Start difference. First operand 400 states and 1209 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:41,374 INFO L93 Difference]: Finished difference Result 520 states and 1552 transitions. [2022-03-15 16:08:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:41,377 INFO L225 Difference]: With dead ends: 520 [2022-03-15 16:08:41,377 INFO L226 Difference]: Without dead ends: 509 [2022-03-15 16:08:41,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:41,377 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:41,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 670 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-03-15 16:08:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-15 16:08:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2022-03-15 16:08:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0277777777777777) internal successors, (1199), 396 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-03-15 16:08:41,385 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-03-15 16:08:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:41,385 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-03-15 16:08:41,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-03-15 16:08:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:41,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:41,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:41,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:41,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:41,586 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 194016301, now seen corresponding path program 23 times [2022-03-15 16:08:41,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:41,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934214508] [2022-03-15 16:08:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:41,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934214508] [2022-03-15 16:08:41,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934214508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:41,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837560570] [2022-03-15 16:08:41,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:41,674 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:41,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:08:41,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:41,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:41,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:41,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:41,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:08:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:41,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:41,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:08:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:41,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837560570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:41,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:41,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:41,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19382622] [2022-03-15 16:08:41,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:41,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:41,964 INFO L87 Difference]: Start difference. First operand 397 states and 1199 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:42,255 INFO L93 Difference]: Finished difference Result 528 states and 1574 transitions. [2022-03-15 16:08:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:42,257 INFO L225 Difference]: With dead ends: 528 [2022-03-15 16:08:42,257 INFO L226 Difference]: Without dead ends: 517 [2022-03-15 16:08:42,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:42,258 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:42,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 60 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 578 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-03-15 16:08:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-15 16:08:42,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 399. [2022-03-15 16:08:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0326633165829144) internal successors, (1207), 398 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1207 transitions. [2022-03-15 16:08:42,266 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1207 transitions. Word has length 20 [2022-03-15 16:08:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:42,266 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1207 transitions. [2022-03-15 16:08:42,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1207 transitions. [2022-03-15 16:08:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:42,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:42,267 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] [2022-03-15 16:08:42,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:42,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:42,487 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash 118180886, now seen corresponding path program 24 times [2022-03-15 16:08:42,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:42,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147845188] [2022-03-15 16:08:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:42,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:42,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:42,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147845188] [2022-03-15 16:08:42,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147845188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:42,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027846621] [2022-03-15 16:08:42,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:42,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:42,562 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:42,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:08:42,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:08:42,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:08:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:42,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:42,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-15 16:08:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:42,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:42,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:42,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-15 16:08:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:43,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027846621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:43,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:43,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-15 16:08:43,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009661742] [2022-03-15 16:08:43,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:43,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:43,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:43,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:43,043 INFO L87 Difference]: Start difference. First operand 399 states and 1207 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:44,208 INFO L93 Difference]: Finished difference Result 602 states and 1788 transitions. [2022-03-15 16:08:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:08:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20 [2022-03-15 16:08:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:44,210 INFO L225 Difference]: With dead ends: 602 [2022-03-15 16:08:44,210 INFO L226 Difference]: Without dead ends: 589 [2022-03-15 16:08:44,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:08:44,211 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 179 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:44,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 99 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1514 Invalid, 0 Unknown, 114 Unchecked, 0.6s Time] [2022-03-15 16:08:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-03-15 16:08:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 403. [2022-03-15 16:08:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.027363184079602) internal successors, (1217), 402 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1217 transitions. [2022-03-15 16:08:44,217 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1217 transitions. Word has length 20 [2022-03-15 16:08:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:44,217 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1217 transitions. [2022-03-15 16:08:44,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1217 transitions. [2022-03-15 16:08:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:44,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:44,218 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] [2022-03-15 16:08:44,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 16:08:44,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:44,418 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 881657575, now seen corresponding path program 24 times [2022-03-15 16:08:44,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:44,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597481082] [2022-03-15 16:08:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:44,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:44,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:44,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597481082] [2022-03-15 16:08:44,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597481082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:44,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369183819] [2022-03-15 16:08:44,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:44,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:44,507 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:44,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:08:44,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:08:44,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:44,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:44,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:44,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:08:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:44,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:44,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:44,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:08:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:44,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:44,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369183819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:44,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:44,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-15 16:08:44,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079824138] [2022-03-15 16:08:44,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:44,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:44,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:44,803 INFO L87 Difference]: Start difference. First operand 403 states and 1217 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:45,049 INFO L93 Difference]: Finished difference Result 537 states and 1583 transitions. [2022-03-15 16:08:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:08:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:45,051 INFO L225 Difference]: With dead ends: 537 [2022-03-15 16:08:45,051 INFO L226 Difference]: Without dead ends: 526 [2022-03-15 16:08:45,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:45,051 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:45,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-03-15 16:08:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-15 16:08:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 404. [2022-03-15 16:08:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0248138957816377) internal successors, (1219), 403 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1219 transitions. [2022-03-15 16:08:45,057 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1219 transitions. Word has length 20 [2022-03-15 16:08:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:45,057 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1219 transitions. [2022-03-15 16:08:45,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1219 transitions. [2022-03-15 16:08:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:45,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:45,059 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] [2022-03-15 16:08:45,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:45,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:08:45,271 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1555083579, now seen corresponding path program 25 times [2022-03-15 16:08:45,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:45,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414286172] [2022-03-15 16:08:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:45,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:45,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414286172] [2022-03-15 16:08:45,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414286172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:45,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621985690] [2022-03-15 16:08:45,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:45,352 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:45,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:08:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:45,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:45,511 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-15 16:08:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:45,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:45,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:45,662 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 11 treesize of output 16 [2022-03-15 16:08:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:45,670 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 11 treesize of output 3 [2022-03-15 16:08:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:45,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621985690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:45,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:45,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:45,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402594980] [2022-03-15 16:08:45,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:45,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:45,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:45,675 INFO L87 Difference]: Start difference. First operand 404 states and 1219 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:45,957 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2022-03-15 16:08:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:08:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:45,959 INFO L225 Difference]: With dead ends: 553 [2022-03-15 16:08:45,959 INFO L226 Difference]: Without dead ends: 542 [2022-03-15 16:08:45,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:45,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:45,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 61 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 577 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-03-15 16:08:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-15 16:08:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 400. [2022-03-15 16:08:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0325814536340854) internal successors, (1210), 399 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1210 transitions. [2022-03-15 16:08:45,965 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1210 transitions. Word has length 20 [2022-03-15 16:08:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:45,965 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1210 transitions. [2022-03-15 16:08:45,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1210 transitions. [2022-03-15 16:08:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:45,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:45,966 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] [2022-03-15 16:08:45,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:08:46,166 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,SelfDestructingSolverStorable69 [2022-03-15 16:08:46,166 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash -426527609, now seen corresponding path program 26 times [2022-03-15 16:08:46,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:46,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741045289] [2022-03-15 16:08:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:46,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:46,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741045289] [2022-03-15 16:08:46,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741045289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:46,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143270765] [2022-03-15 16:08:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:46,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:46,249 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:46,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:08:46,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:46,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:46,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2022-03-15 16:08:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:46,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:46,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:46,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-15 16:08:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:46,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 3 [2022-03-15 16:08:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:46,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143270765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:46,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:46,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:46,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318188487] [2022-03-15 16:08:46,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:46,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:46,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:46,566 INFO L87 Difference]: Start difference. First operand 400 states and 1210 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:46,991 INFO L93 Difference]: Finished difference Result 616 states and 1815 transitions. [2022-03-15 16:08:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:08:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:46,993 INFO L225 Difference]: With dead ends: 616 [2022-03-15 16:08:46,993 INFO L226 Difference]: Without dead ends: 605 [2022-03-15 16:08:46,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:08:46,994 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:46,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 105 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 872 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-03-15 16:08:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-15 16:08:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 408. [2022-03-15 16:08:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2022-03-15 16:08:47,002 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 20 [2022-03-15 16:08:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:47,002 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2022-03-15 16:08:47,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2022-03-15 16:08:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:08:47,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:47,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:47,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:47,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:47,226 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash -493705572, now seen corresponding path program 25 times [2022-03-15 16:08:47,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:47,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121951120] [2022-03-15 16:08:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:47,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:47,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121951120] [2022-03-15 16:08:47,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121951120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:47,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069334408] [2022-03-15 16:08:47,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:47,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:47,310 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:47,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:08:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-15 16:08:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:47,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:47,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:47,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2022-03-15 16:08:47,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:47,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-15 16:08:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:47,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069334408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:47,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:47,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:08:47,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115928254] [2022-03-15 16:08:47,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:47,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:08:47,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:08:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:47,607 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:48,012 INFO L93 Difference]: Finished difference Result 607 states and 1791 transitions. [2022-03-15 16:08:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:08:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:08:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:48,014 INFO L225 Difference]: With dead ends: 607 [2022-03-15 16:08:48,014 INFO L226 Difference]: Without dead ends: 596 [2022-03-15 16:08:48,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:08:48,014 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:48,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 96 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 764 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-03-15 16:08:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-03-15 16:08:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 402. [2022-03-15 16:08:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1214 transitions. [2022-03-15 16:08:48,021 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1214 transitions. Word has length 20 [2022-03-15 16:08:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:48,021 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1214 transitions. [2022-03-15 16:08:48,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1214 transitions. [2022-03-15 16:08:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:48,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:48,022 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] [2022-03-15 16:08:48,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 16:08:48,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:48,222 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash 940655469, now seen corresponding path program 27 times [2022-03-15 16:08:48,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:48,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932313471] [2022-03-15 16:08:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:48,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932313471] [2022-03-15 16:08:48,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932313471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:48,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126295118] [2022-03-15 16:08:48,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:48,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:48,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:48,252 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:48,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:08:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126295118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:48,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:48,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 16:08:48,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215620556] [2022-03-15 16:08:48,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:48,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:08:48,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:08:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:08:48,363 INFO L87 Difference]: Start difference. First operand 402 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:48,456 INFO L93 Difference]: Finished difference Result 599 states and 1760 transitions. [2022-03-15 16:08:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:08:48,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:48,457 INFO L225 Difference]: With dead ends: 599 [2022-03-15 16:08:48,458 INFO L226 Difference]: Without dead ends: 599 [2022-03-15 16:08:48,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:08:48,459 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:48,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 59 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-15 16:08:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 335. [2022-03-15 16:08:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.086826347305389) internal successors, (1031), 334 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2022-03-15 16:08:48,471 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 22 [2022-03-15 16:08:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:48,471 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2022-03-15 16:08:48,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2022-03-15 16:08:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:48,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:48,472 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] [2022-03-15 16:08:48,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 16:08:48,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:48,675 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1281362867, now seen corresponding path program 28 times [2022-03-15 16:08:48,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:48,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638466468] [2022-03-15 16:08:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:48,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638466468] [2022-03-15 16:08:48,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638466468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:48,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094687029] [2022-03-15 16:08:48,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:48,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:48,704 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:48,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:08:48,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:48,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094687029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:48,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:48,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 16:08:48,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63086860] [2022-03-15 16:08:48,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:48,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:08:48,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:08:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:08:48,816 INFO L87 Difference]: Start difference. First operand 335 states and 1031 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:48,950 INFO L93 Difference]: Finished difference Result 500 states and 1455 transitions. [2022-03-15 16:08:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:08:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:48,951 INFO L225 Difference]: With dead ends: 500 [2022-03-15 16:08:48,951 INFO L226 Difference]: Without dead ends: 441 [2022-03-15 16:08:48,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:48,951 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 99 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:48,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-15 16:08:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 335. [2022-03-15 16:08:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.05688622754491) internal successors, (1021), 334 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-03-15 16:08:48,958 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 22 [2022-03-15 16:08:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:48,958 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-03-15 16:08:48,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-03-15 16:08:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:48,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:48,959 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] [2022-03-15 16:08:48,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:49,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:49,163 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:49,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1556134201, now seen corresponding path program 29 times [2022-03-15 16:08:49,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:49,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452189752] [2022-03-15 16:08:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:49,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:49,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452189752] [2022-03-15 16:08:49,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452189752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:49,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405988370] [2022-03-15 16:08:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:49,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:49,204 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:08:49,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:08:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:49,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405988370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:49,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:49,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:49,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592731164] [2022-03-15 16:08:49,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:49,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:49,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:49,344 INFO L87 Difference]: Start difference. First operand 335 states and 1021 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:49,481 INFO L93 Difference]: Finished difference Result 661 states and 1944 transitions. [2022-03-15 16:08:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:08:49,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:49,482 INFO L225 Difference]: With dead ends: 661 [2022-03-15 16:08:49,482 INFO L226 Difference]: Without dead ends: 661 [2022-03-15 16:08:49,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:49,483 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:49,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 68 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-03-15 16:08:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 389. [2022-03-15 16:08:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.1211340206185567) internal successors, (1211), 388 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1211 transitions. [2022-03-15 16:08:49,488 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1211 transitions. Word has length 22 [2022-03-15 16:08:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:49,488 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1211 transitions. [2022-03-15 16:08:49,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1211 transitions. [2022-03-15 16:08:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:49,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:49,489 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] [2022-03-15 16:08:49,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:08:49,689 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,SelfDestructingSolverStorable74 [2022-03-15 16:08:49,689 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1860149017, now seen corresponding path program 30 times [2022-03-15 16:08:49,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:49,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865360183] [2022-03-15 16:08:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:49,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865360183] [2022-03-15 16:08:49,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865360183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:49,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199029487] [2022-03-15 16:08:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:49,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:49,720 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:49,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:08:49,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:08:49,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199029487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:49,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:49,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:49,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526408545] [2022-03-15 16:08:49,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:49,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:49,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:49,871 INFO L87 Difference]: Start difference. First operand 389 states and 1211 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:50,125 INFO L93 Difference]: Finished difference Result 721 states and 2031 transitions. [2022-03-15 16:08:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:08:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:50,127 INFO L225 Difference]: With dead ends: 721 [2022-03-15 16:08:50,127 INFO L226 Difference]: Without dead ends: 685 [2022-03-15 16:08:50,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:50,127 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:50,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 112 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-15 16:08:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2022-03-15 16:08:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.0792682926829267) internal successors, (1515), 492 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1515 transitions. [2022-03-15 16:08:50,136 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1515 transitions. Word has length 22 [2022-03-15 16:08:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:50,136 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1515 transitions. [2022-03-15 16:08:50,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1515 transitions. [2022-03-15 16:08:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:50,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:50,137 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] [2022-03-15 16:08:50,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:50,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:50,338 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1623645695, now seen corresponding path program 31 times [2022-03-15 16:08:50,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:50,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875638715] [2022-03-15 16:08:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:50,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:50,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:50,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875638715] [2022-03-15 16:08:50,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875638715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:50,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483713595] [2022-03-15 16:08:50,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:50,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:50,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:50,363 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:50,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:08:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:50,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:50,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:50,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483713595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:50,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:50,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:50,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682650139] [2022-03-15 16:08:50,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:50,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:50,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:50,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:50,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:50,490 INFO L87 Difference]: Start difference. First operand 493 states and 1515 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:50,652 INFO L93 Difference]: Finished difference Result 955 states and 2765 transitions. [2022-03-15 16:08:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:08:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:50,654 INFO L225 Difference]: With dead ends: 955 [2022-03-15 16:08:50,654 INFO L226 Difference]: Without dead ends: 955 [2022-03-15 16:08:50,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:50,654 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:50,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 90 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-03-15 16:08:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 537. [2022-03-15 16:08:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.173507462686567) internal successors, (1701), 536 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1701 transitions. [2022-03-15 16:08:50,665 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1701 transitions. Word has length 22 [2022-03-15 16:08:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:50,665 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1701 transitions. [2022-03-15 16:08:50,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1701 transitions. [2022-03-15 16:08:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:50,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:50,667 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] [2022-03-15 16:08:50,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:50,883 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,SelfDestructingSolverStorable76 [2022-03-15 16:08:50,883 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1746864421, now seen corresponding path program 32 times [2022-03-15 16:08:50,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:50,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740309875] [2022-03-15 16:08:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:50,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:50,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740309875] [2022-03-15 16:08:50,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740309875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:50,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278621701] [2022-03-15 16:08:50,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:50,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:50,912 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:50,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:08:50,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:50,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278621701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:51,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:51,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:51,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001741558] [2022-03-15 16:08:51,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:51,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:51,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:51,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:51,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:51,055 INFO L87 Difference]: Start difference. First operand 537 states and 1701 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:51,320 INFO L93 Difference]: Finished difference Result 855 states and 2523 transitions. [2022-03-15 16:08:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:08:51,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:51,322 INFO L225 Difference]: With dead ends: 855 [2022-03-15 16:08:51,322 INFO L226 Difference]: Without dead ends: 831 [2022-03-15 16:08:51,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:51,322 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:51,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 117 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-03-15 16:08:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 569. [2022-03-15 16:08:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.214788732394366) internal successors, (1826), 568 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1826 transitions. [2022-03-15 16:08:51,331 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1826 transitions. Word has length 22 [2022-03-15 16:08:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:51,331 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1826 transitions. [2022-03-15 16:08:51,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1826 transitions. [2022-03-15 16:08:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:51,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:51,332 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] [2022-03-15 16:08:51,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 16:08:51,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 16:08:51,532 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 676108133, now seen corresponding path program 33 times [2022-03-15 16:08:51,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:51,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953997113] [2022-03-15 16:08:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:51,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953997113] [2022-03-15 16:08:51,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953997113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:51,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287023631] [2022-03-15 16:08:51,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:51,557 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:51,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:08:51,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:51,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:51,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287023631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:51,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:51,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:51,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298036117] [2022-03-15 16:08:51,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:51,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:51,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:51,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:51,666 INFO L87 Difference]: Start difference. First operand 569 states and 1826 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:51,814 INFO L93 Difference]: Finished difference Result 818 states and 2433 transitions. [2022-03-15 16:08:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:08:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 22 [2022-03-15 16:08:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:51,816 INFO L225 Difference]: With dead ends: 818 [2022-03-15 16:08:51,816 INFO L226 Difference]: Without dead ends: 797 [2022-03-15 16:08:51,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:08:51,816 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 122 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:51,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 97 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-03-15 16:08:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 538. [2022-03-15 16:08:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.2309124767225326) internal successors, (1735), 537 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1735 transitions. [2022-03-15 16:08:51,823 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1735 transitions. Word has length 22 [2022-03-15 16:08:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:51,824 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1735 transitions. [2022-03-15 16:08:51,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1735 transitions. [2022-03-15 16:08:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:51,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:51,825 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] [2022-03-15 16:08:51,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 16:08:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:08:52,025 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1388287935, now seen corresponding path program 34 times [2022-03-15 16:08:52,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:52,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632939378] [2022-03-15 16:08:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:52,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:52,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632939378] [2022-03-15 16:08:52,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632939378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:52,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641099842] [2022-03-15 16:08:52,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:52,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:52,053 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:52,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:08:52,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:52,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641099842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:52,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:52,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:52,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734664557] [2022-03-15 16:08:52,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:52,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:52,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:52,181 INFO L87 Difference]: Start difference. First operand 538 states and 1735 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:52,378 INFO L93 Difference]: Finished difference Result 813 states and 2443 transitions. [2022-03-15 16:08:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:08:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 22 [2022-03-15 16:08:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:52,380 INFO L225 Difference]: With dead ends: 813 [2022-03-15 16:08:52,380 INFO L226 Difference]: Without dead ends: 803 [2022-03-15 16:08:52,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:08:52,380 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:52,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 115 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-15 16:08:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 544. [2022-03-15 16:08:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.2081031307550645) internal successors, (1742), 543 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1742 transitions. [2022-03-15 16:08:52,390 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1742 transitions. Word has length 22 [2022-03-15 16:08:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:52,390 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1742 transitions. [2022-03-15 16:08:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1742 transitions. [2022-03-15 16:08:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:52,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:52,392 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] [2022-03-15 16:08:52,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 16:08:52,595 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,SelfDestructingSolverStorable79 [2022-03-15 16:08:52,595 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:52,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1312956920, now seen corresponding path program 3 times [2022-03-15 16:08:52,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:52,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747771094] [2022-03-15 16:08:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:52,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:52,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747771094] [2022-03-15 16:08:52,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747771094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:52,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270994510] [2022-03-15 16:08:52,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:52,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:52,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:52,621 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:52,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:08:52,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270994510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:52,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:52,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:08:52,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429317576] [2022-03-15 16:08:52,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:08:52,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:08:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:52,759 INFO L87 Difference]: Start difference. First operand 544 states and 1742 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:52,958 INFO L93 Difference]: Finished difference Result 1170 states and 3502 transitions. [2022-03-15 16:08:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:08:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:52,960 INFO L225 Difference]: With dead ends: 1170 [2022-03-15 16:08:52,960 INFO L226 Difference]: Without dead ends: 1170 [2022-03-15 16:08:52,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:52,960 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:52,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 120 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:52,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-03-15 16:08:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 535. [2022-03-15 16:08:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 3.254681647940075) internal successors, (1738), 534 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1738 transitions. [2022-03-15 16:08:52,969 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1738 transitions. Word has length 22 [2022-03-15 16:08:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:52,969 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1738 transitions. [2022-03-15 16:08:52,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1738 transitions. [2022-03-15 16:08:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:52,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:52,970 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] [2022-03-15 16:08:52,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 16:08:53,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:53,171 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 660903613, now seen corresponding path program 35 times [2022-03-15 16:08:53,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:53,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801680027] [2022-03-15 16:08:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:53,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:53,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:53,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801680027] [2022-03-15 16:08:53,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801680027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:53,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265073334] [2022-03-15 16:08:53,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:53,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:53,198 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:53,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:08:53,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:08:53,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:53,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:53,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:53,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265073334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:53,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:53,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:53,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753888285] [2022-03-15 16:08:53,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:53,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:53,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:53,357 INFO L87 Difference]: Start difference. First operand 535 states and 1738 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:53,537 INFO L93 Difference]: Finished difference Result 1254 states and 3793 transitions. [2022-03-15 16:08:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:08:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:53,539 INFO L225 Difference]: With dead ends: 1254 [2022-03-15 16:08:53,539 INFO L226 Difference]: Without dead ends: 1254 [2022-03-15 16:08:53,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:53,540 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:53,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 114 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-03-15 16:08:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 651. [2022-03-15 16:08:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.3784615384615386) internal successors, (2196), 650 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2196 transitions. [2022-03-15 16:08:53,550 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2196 transitions. Word has length 22 [2022-03-15 16:08:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:53,550 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2196 transitions. [2022-03-15 16:08:53,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2196 transitions. [2022-03-15 16:08:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:53,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:53,551 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] [2022-03-15 16:08:53,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 16:08:53,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:53,752 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash 896261373, now seen corresponding path program 36 times [2022-03-15 16:08:53,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:53,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081843515] [2022-03-15 16:08:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:53,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:53,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081843515] [2022-03-15 16:08:53,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081843515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:53,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143007400] [2022-03-15 16:08:53,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:53,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:53,778 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:08:53,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:08:53,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:53,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:53,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:53,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143007400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:53,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:53,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:53,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45820319] [2022-03-15 16:08:53,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:53,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:53,896 INFO L87 Difference]: Start difference. First operand 651 states and 2196 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:54,104 INFO L93 Difference]: Finished difference Result 1121 states and 3415 transitions. [2022-03-15 16:08:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:08:54,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:54,106 INFO L225 Difference]: With dead ends: 1121 [2022-03-15 16:08:54,106 INFO L226 Difference]: Without dead ends: 1116 [2022-03-15 16:08:54,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:08:54,106 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:54,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 110 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-15 16:08:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 651. [2022-03-15 16:08:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.370769230769231) internal successors, (2191), 650 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2191 transitions. [2022-03-15 16:08:54,116 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2191 transitions. Word has length 22 [2022-03-15 16:08:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:54,116 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2191 transitions. [2022-03-15 16:08:54,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2191 transitions. [2022-03-15 16:08:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:54,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:54,117 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] [2022-03-15 16:08:54,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 16:08:54,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:54,318 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 412104765, now seen corresponding path program 37 times [2022-03-15 16:08:54,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:54,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023246375] [2022-03-15 16:08:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:54,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:54,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023246375] [2022-03-15 16:08:54,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023246375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:54,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433811010] [2022-03-15 16:08:54,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:54,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:54,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:54,351 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:54,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:08:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:54,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:54,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433811010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:54,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:54,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:08:54,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722609980] [2022-03-15 16:08:54,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:54,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:08:54,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:08:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:54,472 INFO L87 Difference]: Start difference. First operand 651 states and 2191 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:54,663 INFO L93 Difference]: Finished difference Result 1135 states and 3572 transitions. [2022-03-15 16:08:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:08:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:54,665 INFO L225 Difference]: With dead ends: 1135 [2022-03-15 16:08:54,665 INFO L226 Difference]: Without dead ends: 1127 [2022-03-15 16:08:54,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:08:54,665 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:54,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 92 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-15 16:08:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 732. [2022-03-15 16:08:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.4254445964432283) internal successors, (2504), 731 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2504 transitions. [2022-03-15 16:08:54,676 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2504 transitions. Word has length 22 [2022-03-15 16:08:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:54,676 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2504 transitions. [2022-03-15 16:08:54,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2504 transitions. [2022-03-15 16:08:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:54,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:54,677 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] [2022-03-15 16:08:54,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:08:54,877 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,SelfDestructingSolverStorable83 [2022-03-15 16:08:54,878 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash -235488933, now seen corresponding path program 38 times [2022-03-15 16:08:54,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:54,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418447410] [2022-03-15 16:08:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:54,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:54,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:54,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418447410] [2022-03-15 16:08:54,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418447410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:54,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840964515] [2022-03-15 16:08:54,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:54,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:54,909 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:54,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:08:54,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:54,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840964515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:55,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:55,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:08:55,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851634547] [2022-03-15 16:08:55,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:55,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:08:55,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:55,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:08:55,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:55,079 INFO L87 Difference]: Start difference. First operand 732 states and 2504 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:55,375 INFO L93 Difference]: Finished difference Result 1172 states and 3674 transitions. [2022-03-15 16:08:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:08:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:55,377 INFO L225 Difference]: With dead ends: 1172 [2022-03-15 16:08:55,377 INFO L226 Difference]: Without dead ends: 1172 [2022-03-15 16:08:55,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:55,377 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:55,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 200 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-03-15 16:08:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 754. [2022-03-15 16:08:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4648074369189907) internal successors, (2609), 753 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2609 transitions. [2022-03-15 16:08:55,389 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2609 transitions. Word has length 22 [2022-03-15 16:08:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:55,390 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2609 transitions. [2022-03-15 16:08:55,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2609 transitions. [2022-03-15 16:08:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:55,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:55,391 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] [2022-03-15 16:08:55,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 16:08:55,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:55,591 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 824275693, now seen corresponding path program 39 times [2022-03-15 16:08:55,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:55,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152132264] [2022-03-15 16:08:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:55,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:55,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152132264] [2022-03-15 16:08:55,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152132264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:55,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329091486] [2022-03-15 16:08:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:55,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:55,618 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:55,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:08:55,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:55,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:55,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329091486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:55,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:55,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:08:55,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408363511] [2022-03-15 16:08:55,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:55,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:08:55,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:55,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:08:55,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:55,748 INFO L87 Difference]: Start difference. First operand 754 states and 2609 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:55,996 INFO L93 Difference]: Finished difference Result 1178 states and 3692 transitions. [2022-03-15 16:08:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:08:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:55,998 INFO L225 Difference]: With dead ends: 1178 [2022-03-15 16:08:55,998 INFO L226 Difference]: Without dead ends: 1118 [2022-03-15 16:08:55,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:08:55,999 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:55,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 127 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-15 16:08:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 855. [2022-03-15 16:08:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.4531615925058547) internal successors, (2949), 854 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2949 transitions. [2022-03-15 16:08:56,012 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2949 transitions. Word has length 22 [2022-03-15 16:08:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:56,012 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2949 transitions. [2022-03-15 16:08:56,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2949 transitions. [2022-03-15 16:08:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:56,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:56,014 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] [2022-03-15 16:08:56,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 16:08:56,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:56,227 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash 673068563, now seen corresponding path program 40 times [2022-03-15 16:08:56,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:56,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852149821] [2022-03-15 16:08:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:56,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:56,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852149821] [2022-03-15 16:08:56,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852149821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:56,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188545931] [2022-03-15 16:08:56,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:56,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:56,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:56,251 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:56,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:08:56,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:56,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:56,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188545931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:56,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:56,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:56,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386845305] [2022-03-15 16:08:56,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:56,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:56,370 INFO L87 Difference]: Start difference. First operand 855 states and 2949 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:56,550 INFO L93 Difference]: Finished difference Result 1384 states and 4343 transitions. [2022-03-15 16:08:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:08:56,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:56,552 INFO L225 Difference]: With dead ends: 1384 [2022-03-15 16:08:56,552 INFO L226 Difference]: Without dead ends: 1342 [2022-03-15 16:08:56,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:08:56,553 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 177 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:56,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 131 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-03-15 16:08:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1001. [2022-03-15 16:08:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.436) internal successors, (3436), 1000 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3436 transitions. [2022-03-15 16:08:56,570 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3436 transitions. Word has length 22 [2022-03-15 16:08:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:56,570 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 3436 transitions. [2022-03-15 16:08:56,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3436 transitions. [2022-03-15 16:08:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:56,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:56,571 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] [2022-03-15 16:08:56,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 16:08:56,772 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,SelfDestructingSolverStorable86 [2022-03-15 16:08:56,772 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1391327505, now seen corresponding path program 41 times [2022-03-15 16:08:56,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:56,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485440360] [2022-03-15 16:08:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:56,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485440360] [2022-03-15 16:08:56,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485440360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219406039] [2022-03-15 16:08:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:56,798 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:56,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:08:56,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:08:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:56,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219406039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:56,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:56,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:56,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140077826] [2022-03-15 16:08:56,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:56,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:56,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:56,928 INFO L87 Difference]: Start difference. First operand 1001 states and 3436 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:57,158 INFO L93 Difference]: Finished difference Result 1359 states and 4366 transitions. [2022-03-15 16:08:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:08:57,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:57,161 INFO L225 Difference]: With dead ends: 1359 [2022-03-15 16:08:57,161 INFO L226 Difference]: Without dead ends: 1354 [2022-03-15 16:08:57,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:08:57,161 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:57,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 174 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:08:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-03-15 16:08:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 953. [2022-03-15 16:08:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.4044117647058822) internal successors, (3241), 952 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3241 transitions. [2022-03-15 16:08:57,176 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3241 transitions. Word has length 22 [2022-03-15 16:08:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:57,176 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3241 transitions. [2022-03-15 16:08:57,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3241 transitions. [2022-03-15 16:08:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:57,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:57,178 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] [2022-03-15 16:08:57,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:08:57,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 16:08:57,392 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -28111141, now seen corresponding path program 42 times [2022-03-15 16:08:57,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:57,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914305775] [2022-03-15 16:08:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:57,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:57,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914305775] [2022-03-15 16:08:57,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914305775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:57,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189660266] [2022-03-15 16:08:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:57,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:57,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:57,422 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:57,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:08:57,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:08:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:57,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:57,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189660266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:57,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:57,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:57,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913675427] [2022-03-15 16:08:57,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:57,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:57,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:57,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:57,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:57,558 INFO L87 Difference]: Start difference. First operand 953 states and 3241 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:57,736 INFO L93 Difference]: Finished difference Result 1661 states and 5281 transitions. [2022-03-15 16:08:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:08:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:57,739 INFO L225 Difference]: With dead ends: 1661 [2022-03-15 16:08:57,739 INFO L226 Difference]: Without dead ends: 1661 [2022-03-15 16:08:57,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:08:57,740 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:57,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 120 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-03-15 16:08:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1070. [2022-03-15 16:08:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.4752104770813843) internal successors, (3715), 1069 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3715 transitions. [2022-03-15 16:08:57,757 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3715 transitions. Word has length 22 [2022-03-15 16:08:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:57,757 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3715 transitions. [2022-03-15 16:08:57,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3715 transitions. [2022-03-15 16:08:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:57,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:57,760 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] [2022-03-15 16:08:57,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 16:08:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:57,974 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1520137261, now seen corresponding path program 43 times [2022-03-15 16:08:57,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:57,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343690302] [2022-03-15 16:08:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:57,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:57,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:57,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343690302] [2022-03-15 16:08:57,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343690302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:57,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935143622] [2022-03-15 16:08:57,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:57,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:57,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:57,999 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:58,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:08:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:58,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:58,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:58,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:58,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935143622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:58,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:58,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:58,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52823000] [2022-03-15 16:08:58,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:58,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:58,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:58,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:58,133 INFO L87 Difference]: Start difference. First operand 1070 states and 3715 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:58,350 INFO L93 Difference]: Finished difference Result 1318 states and 4372 transitions. [2022-03-15 16:08:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:08:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:58,353 INFO L225 Difference]: With dead ends: 1318 [2022-03-15 16:08:58,353 INFO L226 Difference]: Without dead ends: 1294 [2022-03-15 16:08:58,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:08:58,353 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 124 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:58,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 136 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-03-15 16:08:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1112. [2022-03-15 16:08:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.532853285328533) internal successors, (3925), 1111 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3925 transitions. [2022-03-15 16:08:58,373 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3925 transitions. Word has length 22 [2022-03-15 16:08:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:58,373 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3925 transitions. [2022-03-15 16:08:58,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3925 transitions. [2022-03-15 16:08:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:58,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:58,376 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] [2022-03-15 16:08:58,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:58,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:58,597 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash -360322321, now seen corresponding path program 44 times [2022-03-15 16:08:58,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:58,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394118072] [2022-03-15 16:08:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:58,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:58,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394118072] [2022-03-15 16:08:58,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394118072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:58,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770360590] [2022-03-15 16:08:58,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:58,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:58,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:58,620 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:58,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:08:58,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:58,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:58,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:58,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:58,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:58,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770360590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:58,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:58,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-15 16:08:58,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510718184] [2022-03-15 16:08:58,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:58,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:58,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:58,738 INFO L87 Difference]: Start difference. First operand 1112 states and 3925 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:58,930 INFO L93 Difference]: Finished difference Result 1655 states and 5369 transitions. [2022-03-15 16:08:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:08:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:58,933 INFO L225 Difference]: With dead ends: 1655 [2022-03-15 16:08:58,933 INFO L226 Difference]: Without dead ends: 1650 [2022-03-15 16:08:58,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:08:58,934 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 154 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:58,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 123 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-03-15 16:08:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1058. [2022-03-15 16:08:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.501419110690634) internal successors, (3701), 1057 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3701 transitions. [2022-03-15 16:08:58,951 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3701 transitions. Word has length 22 [2022-03-15 16:08:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:58,951 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3701 transitions. [2022-03-15 16:08:58,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3701 transitions. [2022-03-15 16:08:58,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:58,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:58,953 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] [2022-03-15 16:08:58,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 16:08:59,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:59,153 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -844478929, now seen corresponding path program 45 times [2022-03-15 16:08:59,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:59,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380356952] [2022-03-15 16:08:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:59,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380356952] [2022-03-15 16:08:59,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380356952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:59,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663564352] [2022-03-15 16:08:59,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:59,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:59,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:59,178 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:59,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:08:59,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:59,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:59,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663564352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:59,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:59,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 16:08:59,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282547678] [2022-03-15 16:08:59,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:59,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:08:59,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:08:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:59,303 INFO L87 Difference]: Start difference. First operand 1058 states and 3701 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:59,512 INFO L93 Difference]: Finished difference Result 1629 states and 5300 transitions. [2022-03-15 16:08:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:08:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:08:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:59,516 INFO L225 Difference]: With dead ends: 1629 [2022-03-15 16:08:59,516 INFO L226 Difference]: Without dead ends: 1621 [2022-03-15 16:08:59,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:08:59,516 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 143 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:59,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 137 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-15 16:08:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1058. [2022-03-15 16:08:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.498580889309366) internal successors, (3698), 1057 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3698 transitions. [2022-03-15 16:08:59,540 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3698 transitions. Word has length 22 [2022-03-15 16:08:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:59,540 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3698 transitions. [2022-03-15 16:08:59,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3698 transitions. [2022-03-15 16:08:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:08:59,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:59,542 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] [2022-03-15 16:08:59,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:59,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:59,763 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:08:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1228711595, now seen corresponding path program 46 times [2022-03-15 16:08:59,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:59,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057368627] [2022-03-15 16:08:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:59,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057368627] [2022-03-15 16:08:59,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057368627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:59,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852626391] [2022-03-15 16:08:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:59,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:59,794 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:59,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:08:59,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:59,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852626391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:59,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:59,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:08:59,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135300076] [2022-03-15 16:08:59,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:59,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:08:59,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:08:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:08:59,921 INFO L87 Difference]: Start difference. First operand 1058 states and 3698 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:00,094 INFO L93 Difference]: Finished difference Result 1982 states and 6436 transitions. [2022-03-15 16:09:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:09:00,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:09:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:00,098 INFO L225 Difference]: With dead ends: 1982 [2022-03-15 16:09:00,098 INFO L226 Difference]: Without dead ends: 1982 [2022-03-15 16:09:00,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:09:00,099 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:00,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 100 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2022-03-15 16:09:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1118. [2022-03-15 16:09:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5380483437779766) internal successors, (3952), 1117 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3952 transitions. [2022-03-15 16:09:00,120 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3952 transitions. Word has length 22 [2022-03-15 16:09:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:00,120 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3952 transitions. [2022-03-15 16:09:00,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3952 transitions. [2022-03-15 16:09:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:09:00,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:00,122 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] [2022-03-15 16:09:00,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 16:09:00,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:00,322 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1936642699, now seen corresponding path program 47 times [2022-03-15 16:09:00,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:00,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930301639] [2022-03-15 16:09:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:00,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:00,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930301639] [2022-03-15 16:09:00,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930301639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:00,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284754194] [2022-03-15 16:09:00,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:00,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:00,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:00,362 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:00,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:09:00,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:09:00,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:00,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:00,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:00,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284754194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:00,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:00,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:09:00,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259186699] [2022-03-15 16:09:00,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:00,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:09:00,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:09:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:00,498 INFO L87 Difference]: Start difference. First operand 1118 states and 3952 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:00,761 INFO L93 Difference]: Finished difference Result 1528 states and 5019 transitions. [2022-03-15 16:09:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:09:00,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:09:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:00,764 INFO L225 Difference]: With dead ends: 1528 [2022-03-15 16:09:00,764 INFO L226 Difference]: Without dead ends: 1504 [2022-03-15 16:09:00,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:09:00,765 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:00,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 162 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:09:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-03-15 16:09:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1118. [2022-03-15 16:09:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.5290957923008057) internal successors, (3942), 1117 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3942 transitions. [2022-03-15 16:09:00,788 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3942 transitions. Word has length 22 [2022-03-15 16:09:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:00,788 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3942 transitions. [2022-03-15 16:09:00,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3942 transitions. [2022-03-15 16:09:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:09:00,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:00,790 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] [2022-03-15 16:09:00,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:01,003 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,SelfDestructingSolverStorable93 [2022-03-15 16:09:01,003 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1339423245, now seen corresponding path program 48 times [2022-03-15 16:09:01,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:01,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398732929] [2022-03-15 16:09:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:01,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:01,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398732929] [2022-03-15 16:09:01,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398732929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:01,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033101918] [2022-03-15 16:09:01,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:01,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:01,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:01,028 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:01,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:09:01,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:09:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:01,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033101918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:01,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:01,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:09:01,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715498432] [2022-03-15 16:09:01,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:01,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:09:01,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:09:01,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:01,144 INFO L87 Difference]: Start difference. First operand 1118 states and 3942 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:01,323 INFO L93 Difference]: Finished difference Result 1348 states and 4465 transitions. [2022-03-15 16:09:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:09:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:09:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:01,325 INFO L225 Difference]: With dead ends: 1348 [2022-03-15 16:09:01,325 INFO L226 Difference]: Without dead ends: 1348 [2022-03-15 16:09:01,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:09:01,325 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:01,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 114 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-03-15 16:09:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1081. [2022-03-15 16:09:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.4935185185185187) internal successors, (3773), 1080 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3773 transitions. [2022-03-15 16:09:01,341 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3773 transitions. Word has length 22 [2022-03-15 16:09:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:01,341 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 3773 transitions. [2022-03-15 16:09:01,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3773 transitions. [2022-03-15 16:09:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:09:01,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:01,343 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] [2022-03-15 16:09:01,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:01,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:01,559 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -724972823, now seen corresponding path program 49 times [2022-03-15 16:09:01,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:01,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810921260] [2022-03-15 16:09:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:01,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:01,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810921260] [2022-03-15 16:09:01,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810921260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:01,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245768967] [2022-03-15 16:09:01,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:01,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:01,586 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:01,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:09:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245768967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:01,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:01,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:09:01,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020416333] [2022-03-15 16:09:01,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:01,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:09:01,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:09:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:01,718 INFO L87 Difference]: Start difference. First operand 1081 states and 3773 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:01,939 INFO L93 Difference]: Finished difference Result 1884 states and 6113 transitions. [2022-03-15 16:09:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:09:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:09:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:01,943 INFO L225 Difference]: With dead ends: 1884 [2022-03-15 16:09:01,943 INFO L226 Difference]: Without dead ends: 1879 [2022-03-15 16:09:01,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:09:01,943 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:01,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 132 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:09:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-03-15 16:09:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1045. [2022-03-15 16:09:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4655172413793105) internal successors, (3618), 1044 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3618 transitions. [2022-03-15 16:09:01,960 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3618 transitions. Word has length 22 [2022-03-15 16:09:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3618 transitions. [2022-03-15 16:09:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3618 transitions. [2022-03-15 16:09:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:09:01,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:01,962 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] [2022-03-15 16:09:01,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 16:09:02,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:02,163 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1044869595, now seen corresponding path program 50 times [2022-03-15 16:09:02,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:02,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965225354] [2022-03-15 16:09:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:02,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965225354] [2022-03-15 16:09:02,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965225354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:02,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910909387] [2022-03-15 16:09:02,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:02,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:02,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:02,188 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:02,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:09:02,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910909387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:02,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:02,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:09:02,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026060667] [2022-03-15 16:09:02,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:02,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:09:02,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:09:02,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:09:02,303 INFO L87 Difference]: Start difference. First operand 1045 states and 3618 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:02,506 INFO L93 Difference]: Finished difference Result 1515 states and 4939 transitions. [2022-03-15 16:09:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 16:09:02,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:09:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:02,509 INFO L225 Difference]: With dead ends: 1515 [2022-03-15 16:09:02,509 INFO L226 Difference]: Without dead ends: 1507 [2022-03-15 16:09:02,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:09:02,509 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:02,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 120 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-15 16:09:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1045. [2022-03-15 16:09:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4626436781609193) internal successors, (3615), 1044 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3615 transitions. [2022-03-15 16:09:02,524 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3615 transitions. Word has length 22 [2022-03-15 16:09:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:02,524 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3615 transitions. [2022-03-15 16:09:02,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3615 transitions. [2022-03-15 16:09:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:09:02,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:02,525 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] [2022-03-15 16:09:02,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 16:09:02,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:02,726 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:02,726 INFO L85 PathProgramCache]: Analyzing trace with hash 562039857, now seen corresponding path program 51 times [2022-03-15 16:09:02,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:02,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093779013] [2022-03-15 16:09:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:02,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:02,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093779013] [2022-03-15 16:09:02,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093779013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:02,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106011442] [2022-03-15 16:09:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:02,757 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:02,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:09:02,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:09:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106011442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:02,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:02,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 16:09:02,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39550056] [2022-03-15 16:09:02,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:02,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:09:02,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:02,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:09:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:09:02,858 INFO L87 Difference]: Start difference. First operand 1045 states and 3615 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:02,991 INFO L93 Difference]: Finished difference Result 1319 states and 4427 transitions. [2022-03-15 16:09:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:09:02,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 22 [2022-03-15 16:09:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:02,993 INFO L225 Difference]: With dead ends: 1319 [2022-03-15 16:09:02,993 INFO L226 Difference]: Without dead ends: 1319 [2022-03-15 16:09:02,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:09:02,994 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:02,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-03-15 16:09:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1053. [2022-03-15 16:09:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.467680608365019) internal successors, (3648), 1052 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3648 transitions. [2022-03-15 16:09:03,008 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3648 transitions. Word has length 22 [2022-03-15 16:09:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:03,008 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3648 transitions. [2022-03-15 16:09:03,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3648 transitions. [2022-03-15 16:09:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:09:03,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:03,010 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] [2022-03-15 16:09:03,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:03,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:03,210 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash 280304051, now seen corresponding path program 52 times [2022-03-15 16:09:03,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:03,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983596820] [2022-03-15 16:09:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:03,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:03,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983596820] [2022-03-15 16:09:03,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983596820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:03,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518165686] [2022-03-15 16:09:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:03,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:03,235 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:09:03,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:09:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:03,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:03,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518165686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:03,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:03,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 16:09:03,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098592490] [2022-03-15 16:09:03,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:03,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:09:03,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:03,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:09:03,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:09:03,334 INFO L87 Difference]: Start difference. First operand 1053 states and 3648 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:03,429 INFO L93 Difference]: Finished difference Result 1256 states and 4266 transitions. [2022-03-15 16:09:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:09:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 22 [2022-03-15 16:09:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:03,431 INFO L225 Difference]: With dead ends: 1256 [2022-03-15 16:09:03,431 INFO L226 Difference]: Without dead ends: 1247 [2022-03-15 16:09:03,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:09:03,432 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:03,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 56 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:09:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-15 16:09:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1053. [2022-03-15 16:09:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.466730038022814) internal successors, (3647), 1052 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3647 transitions. [2022-03-15 16:09:03,445 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3647 transitions. Word has length 22 [2022-03-15 16:09:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:03,445 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3647 transitions. [2022-03-15 16:09:03,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3647 transitions. [2022-03-15 16:09:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:03,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:03,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:03,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:09:03,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:03,648 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1982381327, now seen corresponding path program 53 times [2022-03-15 16:09:03,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:03,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680251113] [2022-03-15 16:09:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:03,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:03,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680251113] [2022-03-15 16:09:03,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680251113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:03,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141820484] [2022-03-15 16:09:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:03,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:03,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:03,867 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:03,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:09:03,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:09:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:03,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:04,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:04,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:04,164 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 37 treesize of output 21 [2022-03-15 16:09:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:04,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:04,494 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:04,494 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 20 treesize of output 43 [2022-03-15 16:09:04,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:04,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:04,549 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 20 treesize of output 3 [2022-03-15 16:09:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:04,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141820484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:04,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:04,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:04,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18636743] [2022-03-15 16:09:04,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:04,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:04,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:04,566 INFO L87 Difference]: Start difference. First operand 1053 states and 3647 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:06,617 INFO L93 Difference]: Finished difference Result 2238 states and 7334 transitions. [2022-03-15 16:09:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:09:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:06,621 INFO L225 Difference]: With dead ends: 2238 [2022-03-15 16:09:06,621 INFO L226 Difference]: Without dead ends: 2218 [2022-03-15 16:09:06,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=3345, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:09:06,622 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 828 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:06,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 295 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2725 Invalid, 0 Unknown, 828 Unchecked, 1.1s Time] [2022-03-15 16:09:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-03-15 16:09:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1144. [2022-03-15 16:09:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.41907261592301) internal successors, (3908), 1143 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3908 transitions. [2022-03-15 16:09:06,644 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3908 transitions. Word has length 24 [2022-03-15 16:09:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:06,644 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 3908 transitions. [2022-03-15 16:09:06,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3908 transitions. [2022-03-15 16:09:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:06,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:06,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:06,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 16:09:06,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 16:09:06,847 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1203543731, now seen corresponding path program 54 times [2022-03-15 16:09:06,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:06,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433633511] [2022-03-15 16:09:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:06,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:07,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:07,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433633511] [2022-03-15 16:09:07,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433633511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:07,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633459888] [2022-03-15 16:09:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:07,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:07,081 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:07,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:09:07,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:09:07,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:09:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:07,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:07,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:07,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:07,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-03-15 16:09:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:07,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:08,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-03-15 16:09:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:08,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633459888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:08,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:08,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:09:08,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489630672] [2022-03-15 16:09:08,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:08,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:09:08,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:09:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:09:08,531 INFO L87 Difference]: Start difference. First operand 1144 states and 3908 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:10,140 INFO L93 Difference]: Finished difference Result 2453 states and 8302 transitions. [2022-03-15 16:09:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:09:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-03-15 16:09:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:10,145 INFO L225 Difference]: With dead ends: 2453 [2022-03-15 16:09:10,145 INFO L226 Difference]: Without dead ends: 2451 [2022-03-15 16:09:10,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=405, Invalid=3501, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:09:10,146 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1761 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:10,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 227 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 936 Invalid, 0 Unknown, 1761 Unchecked, 0.4s Time] [2022-03-15 16:09:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-03-15 16:09:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1173. [2022-03-15 16:09:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.409556313993174) internal successors, (3996), 1172 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3996 transitions. [2022-03-15 16:09:10,167 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3996 transitions. Word has length 24 [2022-03-15 16:09:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:10,167 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 3996 transitions. [2022-03-15 16:09:10,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3996 transitions. [2022-03-15 16:09:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:10,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:10,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:10,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 16:09:10,369 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,SelfDestructingSolverStorable100 [2022-03-15 16:09:10,370 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1332626450, now seen corresponding path program 4 times [2022-03-15 16:09:10,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:10,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999731899] [2022-03-15 16:09:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:10,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:10,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999731899] [2022-03-15 16:09:10,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999731899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:10,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969051014] [2022-03-15 16:09:10,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:10,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:10,632 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:10,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:09:10,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:10,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:10,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:10,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:10,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:09:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:11,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:11,351 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:11,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:09:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:11,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:09:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:11,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969051014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:11,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:11,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:11,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431080580] [2022-03-15 16:09:11,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:11,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:11,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:11,422 INFO L87 Difference]: Start difference. First operand 1173 states and 3996 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:13,132 INFO L93 Difference]: Finished difference Result 2258 states and 7228 transitions. [2022-03-15 16:09:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:09:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:13,136 INFO L225 Difference]: With dead ends: 2258 [2022-03-15 16:09:13,136 INFO L226 Difference]: Without dead ends: 2248 [2022-03-15 16:09:13,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:09:13,137 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1044 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:13,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 208 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2451 Invalid, 0 Unknown, 1044 Unchecked, 1.0s Time] [2022-03-15 16:09:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2022-03-15 16:09:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1125. [2022-03-15 16:09:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.4412811387900355) internal successors, (3868), 1124 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3868 transitions. [2022-03-15 16:09:13,156 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3868 transitions. Word has length 24 [2022-03-15 16:09:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:13,156 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3868 transitions. [2022-03-15 16:09:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3868 transitions. [2022-03-15 16:09:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:13,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:13,158 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] [2022-03-15 16:09:13,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 16:09:13,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 16:09:13,358 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1328662509, now seen corresponding path program 55 times [2022-03-15 16:09:13,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:13,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926761233] [2022-03-15 16:09:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:13,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:13,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926761233] [2022-03-15 16:09:13,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926761233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:13,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139450901] [2022-03-15 16:09:13,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:13,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:13,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:13,565 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:13,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:09:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:13,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:13,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:13,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:13,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:09:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:13,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:14,149 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:14,150 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 20 treesize of output 43 [2022-03-15 16:09:14,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:14,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:14,200 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 20 treesize of output 3 [2022-03-15 16:09:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:14,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139450901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:14,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:14,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:14,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030847106] [2022-03-15 16:09:14,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:14,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:14,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:14,217 INFO L87 Difference]: Start difference. First operand 1125 states and 3868 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:15,981 INFO L93 Difference]: Finished difference Result 2108 states and 6761 transitions. [2022-03-15 16:09:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:09:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,985 INFO L225 Difference]: With dead ends: 2108 [2022-03-15 16:09:15,985 INFO L226 Difference]: Without dead ends: 2101 [2022-03-15 16:09:15,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:09:15,986 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 224 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 201 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2104 Invalid, 0 Unknown, 475 Unchecked, 0.9s Time] [2022-03-15 16:09:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-03-15 16:09:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1165. [2022-03-15 16:09:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.4140893470790377) internal successors, (3974), 1164 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3974 transitions. [2022-03-15 16:09:16,004 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3974 transitions. Word has length 24 [2022-03-15 16:09:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:16,004 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3974 transitions. [2022-03-15 16:09:16,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3974 transitions. [2022-03-15 16:09:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:16,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:16,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:16,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:16,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 16:09:16,206 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash -825385579, now seen corresponding path program 56 times [2022-03-15 16:09:16,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:16,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404876197] [2022-03-15 16:09:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:16,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404876197] [2022-03-15 16:09:16,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404876197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:16,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802470784] [2022-03-15 16:09:16,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:16,422 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:16,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:09:16,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:16,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:09:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:16,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:16,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:16,944 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 29 treesize of output 17 [2022-03-15 16:09:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:17,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:17,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:09:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:17,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802470784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:17,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:17,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:09:17,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425525832] [2022-03-15 16:09:17,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:17,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:09:17,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:09:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:09:17,556 INFO L87 Difference]: Start difference. First operand 1165 states and 3974 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:19,706 INFO L93 Difference]: Finished difference Result 2244 states and 7154 transitions. [2022-03-15 16:09:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:09:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:09:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:19,710 INFO L225 Difference]: With dead ends: 2244 [2022-03-15 16:09:19,710 INFO L226 Difference]: Without dead ends: 2227 [2022-03-15 16:09:19,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=558, Invalid=4992, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:09:19,711 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 233 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:19,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 344 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1670 Invalid, 0 Unknown, 545 Unchecked, 0.7s Time] [2022-03-15 16:09:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2022-03-15 16:09:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1216. [2022-03-15 16:09:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3810699588477364) internal successors, (4108), 1215 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4108 transitions. [2022-03-15 16:09:19,731 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4108 transitions. Word has length 24 [2022-03-15 16:09:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:19,731 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4108 transitions. [2022-03-15 16:09:19,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4108 transitions. [2022-03-15 16:09:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:19,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:19,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:19,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 16:09:19,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:19,934 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:19,934 INFO L85 PathProgramCache]: Analyzing trace with hash -696302860, now seen corresponding path program 5 times [2022-03-15 16:09:19,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:19,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819439178] [2022-03-15 16:09:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:20,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:20,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819439178] [2022-03-15 16:09:20,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819439178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:20,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494377994] [2022-03-15 16:09:20,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:20,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:20,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:20,154 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:20,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:09:20,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:09:20,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:20,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:20,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:20,455 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 17 [2022-03-15 16:09:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:20,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:20,745 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:20,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:09:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:20,802 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 20 treesize of output 3 [2022-03-15 16:09:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:20,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494377994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:20,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:20,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:20,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815261802] [2022-03-15 16:09:20,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:20,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:20,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:20,820 INFO L87 Difference]: Start difference. First operand 1216 states and 4108 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:22,601 INFO L93 Difference]: Finished difference Result 2489 states and 8068 transitions. [2022-03-15 16:09:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:09:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:22,606 INFO L225 Difference]: With dead ends: 2489 [2022-03-15 16:09:22,606 INFO L226 Difference]: Without dead ends: 2482 [2022-03-15 16:09:22,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=2583, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:09:22,606 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 233 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:22,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 233 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2050 Invalid, 0 Unknown, 719 Unchecked, 0.9s Time] [2022-03-15 16:09:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-03-15 16:09:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1182. [2022-03-15 16:09:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.4106689246401354) internal successors, (4028), 1181 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 4028 transitions. [2022-03-15 16:09:22,626 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 4028 transitions. Word has length 24 [2022-03-15 16:09:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:22,627 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 4028 transitions. [2022-03-15 16:09:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 4028 transitions. [2022-03-15 16:09:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:22,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:22,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:22,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 16:09:22,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:22,829 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1876273715, now seen corresponding path program 57 times [2022-03-15 16:09:22,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:22,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743824906] [2022-03-15 16:09:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:23,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743824906] [2022-03-15 16:09:23,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743824906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631628300] [2022-03-15 16:09:23,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:23,041 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:23,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:09:23,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:09:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:09:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:23,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:23,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:09:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:23,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:23,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:24,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:24,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:09:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:24,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631628300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:24,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:24,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:09:24,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773038736] [2022-03-15 16:09:24,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:24,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:09:24,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:09:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:09:24,096 INFO L87 Difference]: Start difference. First operand 1182 states and 4028 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:25,425 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2022-03-15 16:09:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:09:25,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:09:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:25,430 INFO L225 Difference]: With dead ends: 2242 [2022-03-15 16:09:25,430 INFO L226 Difference]: Without dead ends: 2232 [2022-03-15 16:09:25,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=321, Invalid=2985, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:09:25,430 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:25,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 319 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1287 Invalid, 0 Unknown, 624 Unchecked, 0.5s Time] [2022-03-15 16:09:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-03-15 16:09:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1224. [2022-03-15 16:09:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.3810302534750614) internal successors, (4135), 1223 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4135 transitions. [2022-03-15 16:09:25,453 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4135 transitions. Word has length 24 [2022-03-15 16:09:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:25,453 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 4135 transitions. [2022-03-15 16:09:25,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4135 transitions. [2022-03-15 16:09:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:25,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:25,455 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] [2022-03-15 16:09:25,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 16:09:25,655 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,SelfDestructingSolverStorable105 [2022-03-15 16:09:25,655 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1043483089, now seen corresponding path program 58 times [2022-03-15 16:09:25,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:25,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667303495] [2022-03-15 16:09:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:25,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:25,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:25,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667303495] [2022-03-15 16:09:25,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667303495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:25,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043162524] [2022-03-15 16:09:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:25,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:25,870 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:25,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:09:25,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:26,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:26,172 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:09:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:26,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:26,522 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:26,522 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 20 treesize of output 43 [2022-03-15 16:09:26,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:26,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:26,565 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 20 treesize of output 3 [2022-03-15 16:09:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:26,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043162524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:26,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:26,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:26,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696845858] [2022-03-15 16:09:26,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:26,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:26,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:26,582 INFO L87 Difference]: Start difference. First operand 1224 states and 4135 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:28,782 INFO L93 Difference]: Finished difference Result 2323 states and 7425 transitions. [2022-03-15 16:09:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:09:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:28,786 INFO L225 Difference]: With dead ends: 2323 [2022-03-15 16:09:28,786 INFO L226 Difference]: Without dead ends: 2312 [2022-03-15 16:09:28,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=367, Invalid=4055, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:09:28,786 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 278 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:28,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 364 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2533 Invalid, 0 Unknown, 1064 Unchecked, 1.0s Time] [2022-03-15 16:09:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-03-15 16:09:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1189. [2022-03-15 16:09:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.4116161616161618) internal successors, (4053), 1188 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 4053 transitions. [2022-03-15 16:09:28,806 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 4053 transitions. Word has length 24 [2022-03-15 16:09:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:28,806 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 4053 transitions. [2022-03-15 16:09:28,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 4053 transitions. [2022-03-15 16:09:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:28,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:28,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:28,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 16:09:29,008 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,SelfDestructingSolverStorable106 [2022-03-15 16:09:29,008 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash 79322356, now seen corresponding path program 6 times [2022-03-15 16:09:29,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:29,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329318277] [2022-03-15 16:09:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:29,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:29,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:29,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329318277] [2022-03-15 16:09:29,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329318277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:29,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466186661] [2022-03-15 16:09:29,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:29,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:29,229 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:29,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:09:29,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:09:29,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:29,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:09:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:29,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:29,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:29,715 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 22 treesize of output 14 [2022-03-15 16:09:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:29,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:30,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:30,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:30,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 17 treesize of output 42 [2022-03-15 16:09:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:30,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466186661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:30,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:30,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 34 [2022-03-15 16:09:30,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808895126] [2022-03-15 16:09:30,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:30,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:09:30,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:09:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:09:30,200 INFO L87 Difference]: Start difference. First operand 1189 states and 4053 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:31,747 INFO L93 Difference]: Finished difference Result 2483 states and 8473 transitions. [2022-03-15 16:09:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:09:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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 24 [2022-03-15 16:09:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:31,752 INFO L225 Difference]: With dead ends: 2483 [2022-03-15 16:09:31,753 INFO L226 Difference]: Without dead ends: 2473 [2022-03-15 16:09:31,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=3851, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:09:31,753 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 271 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:31,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 216 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1709 Invalid, 0 Unknown, 751 Unchecked, 0.7s Time] [2022-03-15 16:09:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-03-15 16:09:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1210. [2022-03-15 16:09:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.3928866832092637) internal successors, (4102), 1209 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4102 transitions. [2022-03-15 16:09:31,773 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4102 transitions. Word has length 24 [2022-03-15 16:09:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:31,773 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 4102 transitions. [2022-03-15 16:09:31,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4102 transitions. [2022-03-15 16:09:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:31,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:31,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:31,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 16:09:31,975 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,SelfDestructingSolverStorable107 [2022-03-15 16:09:31,975 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1185123218, now seen corresponding path program 7 times [2022-03-15 16:09:31,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:31,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829889092] [2022-03-15 16:09:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:31,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:32,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:32,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829889092] [2022-03-15 16:09:32,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829889092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:32,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186792530] [2022-03-15 16:09:32,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:32,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:32,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:32,218 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:32,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:09:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:32,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:32,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:32,518 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 17 [2022-03-15 16:09:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:32,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:32,821 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:32,821 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 20 treesize of output 43 [2022-03-15 16:09:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:32,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:32,874 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 20 treesize of output 3 [2022-03-15 16:09:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:32,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186792530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:32,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:32,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:32,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055412881] [2022-03-15 16:09:32,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:32,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:32,891 INFO L87 Difference]: Start difference. First operand 1210 states and 4102 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:35,012 INFO L93 Difference]: Finished difference Result 2218 states and 7165 transitions. [2022-03-15 16:09:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:09:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:35,017 INFO L225 Difference]: With dead ends: 2218 [2022-03-15 16:09:35,017 INFO L226 Difference]: Without dead ends: 2213 [2022-03-15 16:09:35,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=316, Invalid=2990, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:09:35,017 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 2227 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:35,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 298 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2650 Invalid, 0 Unknown, 1378 Unchecked, 1.0s Time] [2022-03-15 16:09:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-03-15 16:09:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1167. [2022-03-15 16:09:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.4219554030874786) internal successors, (3990), 1166 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3990 transitions. [2022-03-15 16:09:35,037 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3990 transitions. Word has length 24 [2022-03-15 16:09:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:35,037 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3990 transitions. [2022-03-15 16:09:35,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3990 transitions. [2022-03-15 16:09:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:35,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:35,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:35,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:35,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:35,240 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash 608816537, now seen corresponding path program 59 times [2022-03-15 16:09:35,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:35,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83055911] [2022-03-15 16:09:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:35,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:35,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:35,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83055911] [2022-03-15 16:09:35,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83055911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:35,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456289577] [2022-03-15 16:09:35,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:35,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:35,504 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:35,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:09:35,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:09:35,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:35,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:35,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:35,839 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 17 [2022-03-15 16:09:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:35,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:36,164 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:36,164 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 20 treesize of output 43 [2022-03-15 16:09:36,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:36,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:36,238 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 20 treesize of output 3 [2022-03-15 16:09:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:36,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456289577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:36,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:36,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:09:36,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761807617] [2022-03-15 16:09:36,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:36,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:36,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:36,260 INFO L87 Difference]: Start difference. First operand 1167 states and 3990 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:37,706 INFO L93 Difference]: Finished difference Result 1768 states and 5895 transitions. [2022-03-15 16:09:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:09:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:09:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:37,714 INFO L225 Difference]: With dead ends: 1768 [2022-03-15 16:09:37,714 INFO L226 Difference]: Without dead ends: 1761 [2022-03-15 16:09:37,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:09:37,714 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:37,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 144 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1658 Invalid, 0 Unknown, 373 Unchecked, 0.7s Time] [2022-03-15 16:09:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-03-15 16:09:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1187. [2022-03-15 16:09:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.4106239460370995) internal successors, (4045), 1186 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 4045 transitions. [2022-03-15 16:09:37,748 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 4045 transitions. Word has length 24 [2022-03-15 16:09:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:37,748 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 4045 transitions. [2022-03-15 16:09:37,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 4045 transitions. [2022-03-15 16:09:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:37,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:37,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:37,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:37,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:37,971 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash -655629037, now seen corresponding path program 60 times [2022-03-15 16:09:37,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:37,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258896743] [2022-03-15 16:09:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:37,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:38,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:38,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258896743] [2022-03-15 16:09:38,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258896743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:38,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884000958] [2022-03-15 16:09:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:38,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:38,203 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:38,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:09:38,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:09:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:09:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:38,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:38,772 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 35 treesize of output 47 [2022-03-15 16:09:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:38,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,541 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 41 treesize of output 7 [2022-03-15 16:09:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:39,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884000958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:39,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:39,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:09:39,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963798142] [2022-03-15 16:09:39,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:39,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:09:39,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:09:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:09:39,573 INFO L87 Difference]: Start difference. First operand 1187 states and 4045 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:41,580 INFO L93 Difference]: Finished difference Result 2469 states and 8328 transitions. [2022-03-15 16:09:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:09:41,580 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-03-15 16:09:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:41,585 INFO L225 Difference]: With dead ends: 2469 [2022-03-15 16:09:41,585 INFO L226 Difference]: Without dead ends: 2467 [2022-03-15 16:09:41,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=444, Invalid=4812, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:09:41,585 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 279 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:41,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 231 Invalid, 4045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 842 Invalid, 0 Unknown, 3165 Unchecked, 0.4s Time] [2022-03-15 16:09:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-03-15 16:09:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1214. [2022-03-15 16:09:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.3940643033800493) internal successors, (4117), 1213 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4117 transitions. [2022-03-15 16:09:41,605 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4117 transitions. Word has length 24 [2022-03-15 16:09:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4117 transitions. [2022-03-15 16:09:41,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4117 transitions. [2022-03-15 16:09:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:41,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:41,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:41,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 16:09:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:41,808 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 577333074, now seen corresponding path program 8 times [2022-03-15 16:09:41,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:41,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266811147] [2022-03-15 16:09:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:42,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:42,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266811147] [2022-03-15 16:09:42,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266811147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:42,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550758707] [2022-03-15 16:09:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:42,030 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:42,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:09:42,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:42,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:42,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:42,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:42,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:42,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:42,368 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 35 treesize of output 47 [2022-03-15 16:09:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:42,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:42,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:42,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:42,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-03-15 16:09:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:43,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550758707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:43,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:43,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-15 16:09:43,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639419581] [2022-03-15 16:09:43,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:43,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:09:43,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:09:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:09:43,097 INFO L87 Difference]: Start difference. First operand 1214 states and 4117 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:48,111 INFO L93 Difference]: Finished difference Result 3512 states and 12210 transitions. [2022-03-15 16:09:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:09:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:09:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:48,118 INFO L225 Difference]: With dead ends: 3512 [2022-03-15 16:09:48,118 INFO L226 Difference]: Without dead ends: 3500 [2022-03-15 16:09:48,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1081, Invalid=8425, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:09:48,119 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 359 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:48,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 247 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1491 Invalid, 0 Unknown, 2185 Unchecked, 0.6s Time] [2022-03-15 16:09:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2022-03-15 16:09:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1290. [2022-03-15 16:09:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 3.3622963537626065) internal successors, (4334), 1289 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4334 transitions. [2022-03-15 16:09:48,160 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4334 transitions. Word has length 24 [2022-03-15 16:09:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:48,160 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 4334 transitions. [2022-03-15 16:09:48,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4334 transitions. [2022-03-15 16:09:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:48,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:48,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:48,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 16:09:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:48,363 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 532275187, now seen corresponding path program 61 times [2022-03-15 16:09:48,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:48,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600458133] [2022-03-15 16:09:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:48,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:48,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600458133] [2022-03-15 16:09:48,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600458133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:48,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935397042] [2022-03-15 16:09:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:48,599 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:09:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:09:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:48,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:48,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:48,894 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 17 [2022-03-15 16:09:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:48,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:49,233 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:09:49,233 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 20 treesize of output 43 [2022-03-15 16:09:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:49,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:49,287 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 20 treesize of output 3 [2022-03-15 16:09:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:49,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935397042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:49,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:49,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:09:49,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991800921] [2022-03-15 16:09:49,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:49,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:09:49,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:49,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:09:49,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:09:49,304 INFO L87 Difference]: Start difference. First operand 1290 states and 4334 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:50,572 INFO L93 Difference]: Finished difference Result 2314 states and 7727 transitions. [2022-03-15 16:09:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:09:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:09:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:50,577 INFO L225 Difference]: With dead ends: 2314 [2022-03-15 16:09:50,577 INFO L226 Difference]: Without dead ends: 2307 [2022-03-15 16:09:50,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:09:50,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:50,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 156 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1531 Invalid, 0 Unknown, 483 Unchecked, 0.6s Time] [2022-03-15 16:09:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-03-15 16:09:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1339. [2022-03-15 16:09:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3520179372197307) internal successors, (4485), 1338 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4485 transitions. [2022-03-15 16:09:50,606 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4485 transitions. Word has length 24 [2022-03-15 16:09:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:50,606 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 4485 transitions. [2022-03-15 16:09:50,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4485 transitions. [2022-03-15 16:09:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:50,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:50,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:50,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:50,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 16:09:50,831 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:50,832 INFO L85 PathProgramCache]: Analyzing trace with hash 335761682, now seen corresponding path program 9 times [2022-03-15 16:09:50,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:50,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819193174] [2022-03-15 16:09:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:51,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:51,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819193174] [2022-03-15 16:09:51,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819193174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:51,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951275545] [2022-03-15 16:09:51,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:51,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:51,048 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:51,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 16:09:51,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:09:51,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:09:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:51,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:51,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:51,538 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 21 [2022-03-15 16:09:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:51,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:51,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:51,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:51,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:09:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:52,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951275545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:52,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:52,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:09:52,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384912807] [2022-03-15 16:09:52,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:52,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:09:52,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:52,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:09:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:09:52,082 INFO L87 Difference]: Start difference. First operand 1339 states and 4485 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:54,746 INFO L93 Difference]: Finished difference Result 2562 states and 8265 transitions. [2022-03-15 16:09:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:09:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:09:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:54,751 INFO L225 Difference]: With dead ends: 2562 [2022-03-15 16:09:54,751 INFO L226 Difference]: Without dead ends: 2543 [2022-03-15 16:09:54,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:09:54,752 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 389 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1065 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:54,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 308 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2076 Invalid, 0 Unknown, 1065 Unchecked, 0.9s Time] [2022-03-15 16:09:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-03-15 16:09:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1371. [2022-03-15 16:09:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3445255474452553) internal successors, (4582), 1370 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4582 transitions. [2022-03-15 16:09:54,774 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4582 transitions. Word has length 24 [2022-03-15 16:09:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:54,774 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 4582 transitions. [2022-03-15 16:09:54,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4582 transitions. [2022-03-15 16:09:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:54,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:54,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:54,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 16:09:54,976 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,SelfDestructingSolverStorable113 [2022-03-15 16:09:54,977 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash 911530733, now seen corresponding path program 62 times [2022-03-15 16:09:54,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:54,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485524892] [2022-03-15 16:09:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:55,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:55,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485524892] [2022-03-15 16:09:55,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485524892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:55,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540821140] [2022-03-15 16:09:55,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:55,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:55,204 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:55,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 16:09:55,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:09:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:55,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:55,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:55,542 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:09:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:55,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:56,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:56,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:56,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:56,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:09:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:56,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540821140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:56,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:56,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:09:56,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942297030] [2022-03-15 16:09:56,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:56,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:09:56,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:09:56,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:09:56,418 INFO L87 Difference]: Start difference. First operand 1371 states and 4582 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:57,877 INFO L93 Difference]: Finished difference Result 3295 states and 11576 transitions. [2022-03-15 16:09:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:09:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:09:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:57,884 INFO L225 Difference]: With dead ends: 3295 [2022-03-15 16:09:57,884 INFO L226 Difference]: Without dead ends: 3283 [2022-03-15 16:09:57,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=407, Invalid=3133, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:09:57,884 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 183 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 982 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:57,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 117 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 696 Invalid, 0 Unknown, 982 Unchecked, 0.3s Time] [2022-03-15 16:09:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-03-15 16:09:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 1421. [2022-03-15 16:09:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3422535211267608) internal successors, (4746), 1420 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4746 transitions. [2022-03-15 16:09:57,911 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4746 transitions. Word has length 24 [2022-03-15 16:09:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:57,911 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 4746 transitions. [2022-03-15 16:09:57,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4746 transitions. [2022-03-15 16:09:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:09:57,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:57,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:57,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 16:09:58,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 16:09:58,114 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:09:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:58,114 INFO L85 PathProgramCache]: Analyzing trace with hash -743780497, now seen corresponding path program 63 times [2022-03-15 16:09:58,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:58,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336525847] [2022-03-15 16:09:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:58,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:58,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336525847] [2022-03-15 16:09:58,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336525847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:58,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791139385] [2022-03-15 16:09:58,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:58,391 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:58,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 16:09:58,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:09:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:09:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:59,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:09:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:59,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:59,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:59,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:59,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:09:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:59,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791139385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:59,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:59,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:09:59,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461795061] [2022-03-15 16:09:59,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:59,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:09:59,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:09:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:09:59,584 INFO L87 Difference]: Start difference. First operand 1421 states and 4746 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:02,638 INFO L93 Difference]: Finished difference Result 2354 states and 7764 transitions. [2022-03-15 16:10:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:10:02,638 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 24 [2022-03-15 16:10:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:02,643 INFO L225 Difference]: With dead ends: 2354 [2022-03-15 16:10:02,643 INFO L226 Difference]: Without dead ends: 2342 [2022-03-15 16:10:02,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=579, Invalid=5121, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:10:02,643 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 391 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1867 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:02,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 234 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2258 Invalid, 0 Unknown, 1867 Unchecked, 1.0s Time] [2022-03-15 16:10:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-03-15 16:10:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1445. [2022-03-15 16:10:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.335872576177285) internal successors, (4817), 1444 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4817 transitions. [2022-03-15 16:10:02,664 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4817 transitions. Word has length 24 [2022-03-15 16:10:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:02,664 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 4817 transitions. [2022-03-15 16:10:02,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4817 transitions. [2022-03-15 16:10:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:02,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:02,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:02,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 16:10:02,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:02,866 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1925562905, now seen corresponding path program 64 times [2022-03-15 16:10:02,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:02,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344248389] [2022-03-15 16:10:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:03,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:03,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344248389] [2022-03-15 16:10:03,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344248389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:03,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920933329] [2022-03-15 16:10:03,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:03,117 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:03,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 16:10:03,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:03,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:03,406 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 17 [2022-03-15 16:10:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:03,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:03,684 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:03,685 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 20 treesize of output 43 [2022-03-15 16:10:03,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:03,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:03,751 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 20 treesize of output 3 [2022-03-15 16:10:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:03,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920933329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:03,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:03,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:03,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865417389] [2022-03-15 16:10:03,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:03,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:03,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:03,768 INFO L87 Difference]: Start difference. First operand 1445 states and 4817 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:05,381 INFO L93 Difference]: Finished difference Result 2494 states and 8183 transitions. [2022-03-15 16:10:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:10:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:10:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:05,386 INFO L225 Difference]: With dead ends: 2494 [2022-03-15 16:10:05,386 INFO L226 Difference]: Without dead ends: 2487 [2022-03-15 16:10:05,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=287, Invalid=2163, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:10:05,386 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 201 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:05,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 174 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1860 Invalid, 0 Unknown, 500 Unchecked, 0.8s Time] [2022-03-15 16:10:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-03-15 16:10:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1474. [2022-03-15 16:10:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.3346911065852) internal successors, (4912), 1473 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4912 transitions. [2022-03-15 16:10:05,419 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4912 transitions. Word has length 24 [2022-03-15 16:10:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:05,419 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4912 transitions. [2022-03-15 16:10:05,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4912 transitions. [2022-03-15 16:10:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:05,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:05,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:05,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 16:10:05,621 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,SelfDestructingSolverStorable116 [2022-03-15 16:10:05,621 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1055124371, now seen corresponding path program 65 times [2022-03-15 16:10:05,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:05,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917681900] [2022-03-15 16:10:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:05,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:05,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:05,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917681900] [2022-03-15 16:10:05,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917681900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:05,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831187775] [2022-03-15 16:10:05,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:10:05,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:05,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:05,878 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:05,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 16:10:05,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:10:05,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:06,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:06,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:06,151 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 37 treesize of output 21 [2022-03-15 16:10:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:06,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:06,469 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:06,469 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 20 treesize of output 43 [2022-03-15 16:10:06,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:06,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:06,514 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 20 treesize of output 3 [2022-03-15 16:10:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:06,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831187775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:06,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:06,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:06,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692907715] [2022-03-15 16:10:06,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:06,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:06,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:06,532 INFO L87 Difference]: Start difference. First operand 1474 states and 4912 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:08,308 INFO L93 Difference]: Finished difference Result 2507 states and 8478 transitions. [2022-03-15 16:10:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:10:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:10:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:08,313 INFO L225 Difference]: With dead ends: 2507 [2022-03-15 16:10:08,313 INFO L226 Difference]: Without dead ends: 2500 [2022-03-15 16:10:08,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=2029, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:10:08,314 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:08,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 124 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2248 Invalid, 0 Unknown, 733 Unchecked, 0.9s Time] [2022-03-15 16:10:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2022-03-15 16:10:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1492. [2022-03-15 16:10:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3333333333333335) internal successors, (4970), 1491 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4970 transitions. [2022-03-15 16:10:08,335 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4970 transitions. Word has length 24 [2022-03-15 16:10:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:08,335 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 4970 transitions. [2022-03-15 16:10:08,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4970 transitions. [2022-03-15 16:10:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:08,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:08,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:08,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 16:10:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-15 16:10:08,537 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2135632231, now seen corresponding path program 66 times [2022-03-15 16:10:08,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:08,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638914856] [2022-03-15 16:10:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:08,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:08,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638914856] [2022-03-15 16:10:08,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638914856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:08,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224231479] [2022-03-15 16:10:08,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:10:08,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:08,788 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:08,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 16:10:08,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:10:08,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:10:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:09,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:09,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:09,279 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 31 treesize of output 43 [2022-03-15 16:10:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:09,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:10,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:10,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:10,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-03-15 16:10:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:10,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224231479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:10,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:10,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:10:10,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248565763] [2022-03-15 16:10:10,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:10,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:10:10,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:10:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:10:10,201 INFO L87 Difference]: Start difference. First operand 1492 states and 4970 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:11,765 INFO L93 Difference]: Finished difference Result 2317 states and 7712 transitions. [2022-03-15 16:10:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:10:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:10:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:11,770 INFO L225 Difference]: With dead ends: 2317 [2022-03-15 16:10:11,770 INFO L226 Difference]: Without dead ends: 2311 [2022-03-15 16:10:11,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:10:11,770 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:11,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 163 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1183 Invalid, 0 Unknown, 700 Unchecked, 0.5s Time] [2022-03-15 16:10:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-03-15 16:10:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1503. [2022-03-15 16:10:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.3302263648468706) internal successors, (5002), 1502 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5002 transitions. [2022-03-15 16:10:11,802 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5002 transitions. Word has length 24 [2022-03-15 16:10:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:11,802 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 5002 transitions. [2022-03-15 16:10:11,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5002 transitions. [2022-03-15 16:10:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:11,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:11,804 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] [2022-03-15 16:10:11,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:12,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:12,004 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash 658794093, now seen corresponding path program 67 times [2022-03-15 16:10:12,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:12,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35147313] [2022-03-15 16:10:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:12,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:12,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35147313] [2022-03-15 16:10:12,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35147313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:12,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312501889] [2022-03-15 16:10:12,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:10:12,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:12,300 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:12,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 16:10:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:12,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:12,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:12,557 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 33 treesize of output 17 [2022-03-15 16:10:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:12,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:12,870 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:12,870 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:10:12,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:12,926 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 20 treesize of output 3 [2022-03-15 16:10:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:12,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312501889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:12,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:12,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:12,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899711341] [2022-03-15 16:10:12,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:12,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:12,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:12,944 INFO L87 Difference]: Start difference. First operand 1503 states and 5002 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:14,164 INFO L93 Difference]: Finished difference Result 1956 states and 6536 transitions. [2022-03-15 16:10:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:10:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:10:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:14,169 INFO L225 Difference]: With dead ends: 1956 [2022-03-15 16:10:14,169 INFO L226 Difference]: Without dead ends: 1946 [2022-03-15 16:10:14,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:10:14,169 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 135 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:14,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 78 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1275 Invalid, 0 Unknown, 358 Unchecked, 0.6s Time] [2022-03-15 16:10:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-15 16:10:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1484. [2022-03-15 16:10:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.3391773432231964) internal successors, (4952), 1483 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4952 transitions. [2022-03-15 16:10:14,188 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4952 transitions. Word has length 24 [2022-03-15 16:10:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:14,188 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 4952 transitions. [2022-03-15 16:10:14,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4952 transitions. [2022-03-15 16:10:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:14,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:14,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:14,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 16:10:14,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:14,391 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1996948091, now seen corresponding path program 68 times [2022-03-15 16:10:14,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:14,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88312081] [2022-03-15 16:10:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:14,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:14,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88312081] [2022-03-15 16:10:14,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88312081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:14,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776118307] [2022-03-15 16:10:14,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:10:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:14,688 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:14,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 16:10:14,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:10:14,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:14,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:10:14,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:15,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:15,032 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:10:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:15,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:15,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:15,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:10:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:15,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776118307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:15,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:15,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:10:15,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658656430] [2022-03-15 16:10:15,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:15,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:10:15,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:15,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:10:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:10:15,866 INFO L87 Difference]: Start difference. First operand 1484 states and 4952 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:18,892 INFO L93 Difference]: Finished difference Result 3982 states and 14201 transitions. [2022-03-15 16:10:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 16:10:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:10:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:18,900 INFO L225 Difference]: With dead ends: 3982 [2022-03-15 16:10:18,900 INFO L226 Difference]: Without dead ends: 3971 [2022-03-15 16:10:18,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=747, Invalid=5733, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:10:18,901 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 211 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1347 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:18,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 166 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 739 Invalid, 0 Unknown, 1347 Unchecked, 0.3s Time] [2022-03-15 16:10:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2022-03-15 16:10:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 1505. [2022-03-15 16:10:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.3397606382978724) internal successors, (5023), 1504 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5023 transitions. [2022-03-15 16:10:18,935 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5023 transitions. Word has length 24 [2022-03-15 16:10:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:18,935 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 5023 transitions. [2022-03-15 16:10:18,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5023 transitions. [2022-03-15 16:10:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:18,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:18,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:18,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 16:10:19,137 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,SelfDestructingSolverStorable120 [2022-03-15 16:10:19,138 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash -682668071, now seen corresponding path program 69 times [2022-03-15 16:10:19,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:19,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563339564] [2022-03-15 16:10:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:19,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:19,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563339564] [2022-03-15 16:10:19,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563339564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:19,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559845860] [2022-03-15 16:10:19,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:10:19,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:19,387 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:19,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 16:10:19,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:10:19,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:19,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:10:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:19,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:19,743 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 29 treesize of output 17 [2022-03-15 16:10:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:19,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:20,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:20,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:20,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:10:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:20,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559845860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:20,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:20,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:10:20,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407708550] [2022-03-15 16:10:20,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:20,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:10:20,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:10:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:10:20,252 INFO L87 Difference]: Start difference. First operand 1505 states and 5023 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:21,312 INFO L93 Difference]: Finished difference Result 1914 states and 6410 transitions. [2022-03-15 16:10:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:10:21,313 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:10:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:21,316 INFO L225 Difference]: With dead ends: 1914 [2022-03-15 16:10:21,316 INFO L226 Difference]: Without dead ends: 1909 [2022-03-15 16:10:21,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:10:21,317 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:21,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 104 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1242 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-03-15 16:10:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-03-15 16:10:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1506. [2022-03-15 16:10:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.338870431893688) internal successors, (5025), 1505 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5025 transitions. [2022-03-15 16:10:21,335 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5025 transitions. Word has length 24 [2022-03-15 16:10:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:21,335 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5025 transitions. [2022-03-15 16:10:21,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5025 transitions. [2022-03-15 16:10:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:21,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:21,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:21,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:21,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:21,538 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2004616198, now seen corresponding path program 2 times [2022-03-15 16:10:21,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:21,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801503473] [2022-03-15 16:10:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:21,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:21,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:21,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801503473] [2022-03-15 16:10:21,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801503473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:21,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434354737] [2022-03-15 16:10:21,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:10:21,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:21,781 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:21,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 16:10:21,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:10:21,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:10:21,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:22,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:22,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:22,122 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:10:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:22,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:22,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:22,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:22,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:22,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:10:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:22,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434354737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:22,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:22,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:10:22,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758142193] [2022-03-15 16:10:22,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:22,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:10:22,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:10:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:10:22,964 INFO L87 Difference]: Start difference. First operand 1506 states and 5025 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:25,267 INFO L93 Difference]: Finished difference Result 4648 states and 16987 transitions. [2022-03-15 16:10:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:10:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:10:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:25,276 INFO L225 Difference]: With dead ends: 4648 [2022-03-15 16:10:25,276 INFO L226 Difference]: Without dead ends: 4646 [2022-03-15 16:10:25,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=738, Invalid=3818, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:10:25,277 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 163 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:25,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 198 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 919 Invalid, 0 Unknown, 1502 Unchecked, 0.5s Time] [2022-03-15 16:10:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2022-03-15 16:10:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 1557. [2022-03-15 16:10:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3553984575835476) internal successors, (5221), 1556 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5221 transitions. [2022-03-15 16:10:25,313 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5221 transitions. Word has length 24 [2022-03-15 16:10:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:25,313 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5221 transitions. [2022-03-15 16:10:25,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5221 transitions. [2022-03-15 16:10:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:25,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:25,315 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] [2022-03-15 16:10:25,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 16:10:25,516 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,SelfDestructingSolverStorable122 [2022-03-15 16:10:25,516 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1429097984, now seen corresponding path program 3 times [2022-03-15 16:10:25,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:25,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435552939] [2022-03-15 16:10:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:25,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:25,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435552939] [2022-03-15 16:10:25,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435552939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:25,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333155723] [2022-03-15 16:10:25,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:10:25,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:25,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:25,785 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:25,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 16:10:25,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:10:25,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:25,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:10:25,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:26,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:26,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:26,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:26,273 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 29 treesize of output 17 [2022-03-15 16:10:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:26,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:26,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:26,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:26,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:10:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:26,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333155723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:26,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:26,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:10:26,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986096768] [2022-03-15 16:10:26,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:26,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:10:26,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:10:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:10:26,781 INFO L87 Difference]: Start difference. First operand 1557 states and 5221 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:29,274 INFO L93 Difference]: Finished difference Result 2310 states and 7511 transitions. [2022-03-15 16:10:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:10:29,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:10:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:29,278 INFO L225 Difference]: With dead ends: 2310 [2022-03-15 16:10:29,278 INFO L226 Difference]: Without dead ends: 2298 [2022-03-15 16:10:29,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=420, Invalid=3740, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:10:29,279 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 265 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:29,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 242 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2338 Invalid, 0 Unknown, 875 Unchecked, 1.0s Time] [2022-03-15 16:10:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-03-15 16:10:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1566. [2022-03-15 16:10:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3501597444089457) internal successors, (5243), 1565 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5243 transitions. [2022-03-15 16:10:29,310 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5243 transitions. Word has length 24 [2022-03-15 16:10:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:29,310 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5243 transitions. [2022-03-15 16:10:29,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:29,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5243 transitions. [2022-03-15 16:10:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:29,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:29,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:29,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-15 16:10:29,513 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,SelfDestructingSolverStorable123 [2022-03-15 16:10:29,513 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash -976071078, now seen corresponding path program 4 times [2022-03-15 16:10:29,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:29,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747562136] [2022-03-15 16:10:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:29,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:29,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747562136] [2022-03-15 16:10:29,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747562136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:29,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408269988] [2022-03-15 16:10:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:29,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:29,754 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:29,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 16:10:29,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:30,013 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 17 [2022-03-15 16:10:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:30,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:30,327 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:30,327 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 20 treesize of output 43 [2022-03-15 16:10:30,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:30,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:30,380 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 20 treesize of output 3 [2022-03-15 16:10:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:30,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408269988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:30,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:30,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:30,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665928781] [2022-03-15 16:10:30,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:30,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:30,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:30,398 INFO L87 Difference]: Start difference. First operand 1566 states and 5243 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:31,659 INFO L93 Difference]: Finished difference Result 2263 states and 7642 transitions. [2022-03-15 16:10:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:10:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:10:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:31,664 INFO L225 Difference]: With dead ends: 2263 [2022-03-15 16:10:31,664 INFO L226 Difference]: Without dead ends: 2256 [2022-03-15 16:10:31,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:10:31,665 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:31,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 107 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1401 Invalid, 0 Unknown, 659 Unchecked, 0.6s Time] [2022-03-15 16:10:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-15 16:10:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1559. [2022-03-15 16:10:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.3581514762516047) internal successors, (5232), 1558 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5232 transitions. [2022-03-15 16:10:31,688 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5232 transitions. Word has length 24 [2022-03-15 16:10:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:31,688 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 5232 transitions. [2022-03-15 16:10:31,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5232 transitions. [2022-03-15 16:10:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:31,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:31,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:31,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:31,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:31,891 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1659655765, now seen corresponding path program 70 times [2022-03-15 16:10:31,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:31,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193045014] [2022-03-15 16:10:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:32,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:32,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193045014] [2022-03-15 16:10:32,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193045014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:32,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064147623] [2022-03-15 16:10:32,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:32,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:32,127 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:32,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 16:10:32,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:32,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:32,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:32,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:32,395 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 17 [2022-03-15 16:10:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:32,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:32,720 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:32,721 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 20 treesize of output 43 [2022-03-15 16:10:32,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:32,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:32,776 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 20 treesize of output 3 [2022-03-15 16:10:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:32,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064147623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:32,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:32,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:32,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849708167] [2022-03-15 16:10:32,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:32,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:32,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:32,794 INFO L87 Difference]: Start difference. First operand 1559 states and 5232 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:34,069 INFO L93 Difference]: Finished difference Result 2081 states and 6948 transitions. [2022-03-15 16:10:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:10:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:10:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:34,082 INFO L225 Difference]: With dead ends: 2081 [2022-03-15 16:10:34,082 INFO L226 Difference]: Without dead ends: 2074 [2022-03-15 16:10:34,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:10:34,082 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:34,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 101 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1404 Invalid, 0 Unknown, 500 Unchecked, 0.6s Time] [2022-03-15 16:10:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-03-15 16:10:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1560. [2022-03-15 16:10:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.3598460551635663) internal successors, (5238), 1559 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5238 transitions. [2022-03-15 16:10:34,102 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5238 transitions. Word has length 24 [2022-03-15 16:10:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:34,102 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5238 transitions. [2022-03-15 16:10:34,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5238 transitions. [2022-03-15 16:10:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:34,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:34,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:34,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-15 16:10:34,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 16:10:34,305 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash 579147905, now seen corresponding path program 71 times [2022-03-15 16:10:34,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:34,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450355035] [2022-03-15 16:10:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:34,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:34,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:34,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450355035] [2022-03-15 16:10:34,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450355035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:34,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887738257] [2022-03-15 16:10:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:10:34,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:34,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:34,597 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:34,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 16:10:34,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:10:34,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:34,925 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 37 treesize of output 21 [2022-03-15 16:10:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:34,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:35,238 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:35,238 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 20 treesize of output 43 [2022-03-15 16:10:35,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:35,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:35,296 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 20 treesize of output 3 [2022-03-15 16:10:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:35,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887738257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:35,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:35,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:35,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246530721] [2022-03-15 16:10:35,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:35,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:35,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:35,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:35,313 INFO L87 Difference]: Start difference. First operand 1560 states and 5238 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:36,925 INFO L93 Difference]: Finished difference Result 2500 states and 8502 transitions. [2022-03-15 16:10:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:10:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:10:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:36,930 INFO L225 Difference]: With dead ends: 2500 [2022-03-15 16:10:36,930 INFO L226 Difference]: Without dead ends: 2490 [2022-03-15 16:10:36,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:10:36,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:36,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 115 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1705 Invalid, 0 Unknown, 697 Unchecked, 0.8s Time] [2022-03-15 16:10:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2022-03-15 16:10:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1558. [2022-03-15 16:10:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.3538856775850996) internal successors, (5222), 1557 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5222 transitions. [2022-03-15 16:10:36,955 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5222 transitions. Word has length 24 [2022-03-15 16:10:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:36,955 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 5222 transitions. [2022-03-15 16:10:36,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5222 transitions. [2022-03-15 16:10:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:36,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:36,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:36,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 16:10:37,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 16:10:37,159 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1192444841, now seen corresponding path program 72 times [2022-03-15 16:10:37,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:37,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125215735] [2022-03-15 16:10:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:37,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:37,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:37,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125215735] [2022-03-15 16:10:37,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125215735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:37,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674405360] [2022-03-15 16:10:37,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:10:37,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:37,375 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:37,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 16:10:37,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:10:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:10:37,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:37,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:37,931 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 31 treesize of output 43 [2022-03-15 16:10:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:38,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:38,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:38,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:38,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-03-15 16:10:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:38,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674405360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:38,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:38,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:10:38,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356881917] [2022-03-15 16:10:38,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:38,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:10:38,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:10:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:10:38,781 INFO L87 Difference]: Start difference. First operand 1558 states and 5222 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:40,286 INFO L93 Difference]: Finished difference Result 2404 states and 7972 transitions. [2022-03-15 16:10:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:10:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-03-15 16:10:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:40,291 INFO L225 Difference]: With dead ends: 2404 [2022-03-15 16:10:40,291 INFO L226 Difference]: Without dead ends: 2394 [2022-03-15 16:10:40,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=3121, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:10:40,292 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:40,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 215 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1083 Invalid, 0 Unknown, 1294 Unchecked, 0.5s Time] [2022-03-15 16:10:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2022-03-15 16:10:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1577. [2022-03-15 16:10:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 3.350253807106599) internal successors, (5280), 1576 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5280 transitions. [2022-03-15 16:10:40,326 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5280 transitions. Word has length 24 [2022-03-15 16:10:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:40,326 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5280 transitions. [2022-03-15 16:10:40,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5280 transitions. [2022-03-15 16:10:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:40,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:40,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:40,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-15 16:10:40,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:40,530 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash -604506518, now seen corresponding path program 10 times [2022-03-15 16:10:40,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:40,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578118828] [2022-03-15 16:10:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:40,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:40,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578118828] [2022-03-15 16:10:40,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578118828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:40,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328190561] [2022-03-15 16:10:40,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:40,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:40,796 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:40,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 16:10:40,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:40,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:40,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:41,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-15 16:10:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:41,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:41,429 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:41,430 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:10:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:41,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:41,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:41,480 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 20 treesize of output 3 [2022-03-15 16:10:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:41,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328190561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:41,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:41,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:10:41,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727141272] [2022-03-15 16:10:41,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:41,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:10:41,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:10:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:10:41,498 INFO L87 Difference]: Start difference. First operand 1577 states and 5280 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:43,568 INFO L93 Difference]: Finished difference Result 2733 states and 9077 transitions. [2022-03-15 16:10:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:10:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:10:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:43,573 INFO L225 Difference]: With dead ends: 2733 [2022-03-15 16:10:43,574 INFO L226 Difference]: Without dead ends: 2726 [2022-03-15 16:10:43,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=2890, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:10:43,574 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1306 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:43,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 3949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2607 Invalid, 0 Unknown, 1306 Unchecked, 1.1s Time] [2022-03-15 16:10:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-03-15 16:10:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1484. [2022-03-15 16:10:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.390424814565071) internal successors, (5028), 1483 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5028 transitions. [2022-03-15 16:10:43,611 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5028 transitions. Word has length 24 [2022-03-15 16:10:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:43,611 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 5028 transitions. [2022-03-15 16:10:43,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5028 transitions. [2022-03-15 16:10:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:43,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:43,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:43,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 16:10:43,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:43,828 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1535362685, now seen corresponding path program 73 times [2022-03-15 16:10:43,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:43,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42754646] [2022-03-15 16:10:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:44,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:44,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42754646] [2022-03-15 16:10:44,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42754646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:44,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258779029] [2022-03-15 16:10:44,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:10:44,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:44,058 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:44,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 16:10:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:44,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:44,360 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 17 [2022-03-15 16:10:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:44,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:44,636 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:44,637 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 20 treesize of output 43 [2022-03-15 16:10:44,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,690 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 20 treesize of output 3 [2022-03-15 16:10:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:44,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258779029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:44,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:44,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:44,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408167914] [2022-03-15 16:10:44,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:44,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:44,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:44,708 INFO L87 Difference]: Start difference. First operand 1484 states and 5028 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:48,322 INFO L93 Difference]: Finished difference Result 4104 states and 14266 transitions. [2022-03-15 16:10:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:10:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:10:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:48,330 INFO L225 Difference]: With dead ends: 4104 [2022-03-15 16:10:48,330 INFO L226 Difference]: Without dead ends: 4097 [2022-03-15 16:10:48,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=874, Invalid=6266, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:10:48,331 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:48,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 158 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2538 Invalid, 0 Unknown, 824 Unchecked, 1.1s Time] [2022-03-15 16:10:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2022-03-15 16:10:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 1460. [2022-03-15 16:10:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.3927347498286498) internal successors, (4950), 1459 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4950 transitions. [2022-03-15 16:10:48,366 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4950 transitions. Word has length 24 [2022-03-15 16:10:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:48,366 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4950 transitions. [2022-03-15 16:10:48,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4950 transitions. [2022-03-15 16:10:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:48,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:48,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:48,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 16:10:48,589 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,SelfDestructingSolverStorable129 [2022-03-15 16:10:48,589 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash -521330513, now seen corresponding path program 74 times [2022-03-15 16:10:48,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:48,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126992055] [2022-03-15 16:10:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:48,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:48,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126992055] [2022-03-15 16:10:48,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126992055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:48,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166229946] [2022-03-15 16:10:48,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:10:48,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:48,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:48,834 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:48,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 16:10:48,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:10:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:10:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:49,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:49,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:49,176 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:10:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:49,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:49,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:49,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:49,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:49,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:10:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:49,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166229946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:49,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:49,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:10:49,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490789629] [2022-03-15 16:10:49,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:49,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:10:49,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:10:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:10:49,988 INFO L87 Difference]: Start difference. First operand 1460 states and 4950 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:52,276 INFO L93 Difference]: Finished difference Result 3094 states and 11094 transitions. [2022-03-15 16:10:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:10:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:10:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:52,282 INFO L225 Difference]: With dead ends: 3094 [2022-03-15 16:10:52,282 INFO L226 Difference]: Without dead ends: 3084 [2022-03-15 16:10:52,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=600, Invalid=4370, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:10:52,282 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1359 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:52,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 156 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 749 Invalid, 0 Unknown, 1359 Unchecked, 0.3s Time] [2022-03-15 16:10:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-03-15 16:10:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1504. [2022-03-15 16:10:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.4105123087159015) internal successors, (5126), 1503 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5126 transitions. [2022-03-15 16:10:52,308 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5126 transitions. Word has length 24 [2022-03-15 16:10:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:52,308 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5126 transitions. [2022-03-15 16:10:52,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5126 transitions. [2022-03-15 16:10:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:52,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:52,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:52,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 16:10:52,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:52,510 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash 792949507, now seen corresponding path program 75 times [2022-03-15 16:10:52,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:52,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514500770] [2022-03-15 16:10:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:52,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:52,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:52,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514500770] [2022-03-15 16:10:52,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514500770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:52,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428348553] [2022-03-15 16:10:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:10:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:52,804 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:52,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 16:10:52,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:10:52,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:10:52,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:53,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:53,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:53,145 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:10:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:53,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:53,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:53,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:10:53,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:10:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:54,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428348553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:54,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:54,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:10:54,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923148744] [2022-03-15 16:10:54,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:54,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:10:54,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:10:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:10:54,022 INFO L87 Difference]: Start difference. First operand 1504 states and 5126 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:57,189 INFO L93 Difference]: Finished difference Result 3055 states and 10444 transitions. [2022-03-15 16:10:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:10:57,189 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:10:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:57,195 INFO L225 Difference]: With dead ends: 3055 [2022-03-15 16:10:57,195 INFO L226 Difference]: Without dead ends: 3042 [2022-03-15 16:10:57,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:10:57,195 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2509 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:57,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 176 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1102 Invalid, 0 Unknown, 2509 Unchecked, 0.5s Time] [2022-03-15 16:10:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-03-15 16:10:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1552. [2022-03-15 16:10:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.4165054803352675) internal successors, (5299), 1551 states have internal predecessors, (5299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5299 transitions. [2022-03-15 16:10:57,221 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5299 transitions. Word has length 24 [2022-03-15 16:10:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:57,222 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5299 transitions. [2022-03-15 16:10:57,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5299 transitions. [2022-03-15 16:10:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:10:57,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:57,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:57,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 16:10:57,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:57,424 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:10:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -239064859, now seen corresponding path program 76 times [2022-03-15 16:10:57,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:57,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822950374] [2022-03-15 16:10:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:57,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:57,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822950374] [2022-03-15 16:10:57,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822950374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:57,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018698278] [2022-03-15 16:10:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:57,712 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:57,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 16:10:57,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:57,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:57,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:10:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:58,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:58,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:58,061 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 17 [2022-03-15 16:10:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:58,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:58,339 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:10:58,339 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 20 treesize of output 43 [2022-03-15 16:10:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:58,395 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 20 treesize of output 3 [2022-03-15 16:10:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:58,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018698278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:58,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:58,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:10:58,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998293497] [2022-03-15 16:10:58,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:58,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:10:58,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:58,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:10:58,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:10:58,413 INFO L87 Difference]: Start difference. First operand 1552 states and 5299 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:00,849 INFO L93 Difference]: Finished difference Result 3034 states and 10291 transitions. [2022-03-15 16:11:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:11:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:00,854 INFO L225 Difference]: With dead ends: 3034 [2022-03-15 16:11:00,854 INFO L226 Difference]: Without dead ends: 3026 [2022-03-15 16:11:00,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:11:00,855 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 184 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:00,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2181 Invalid, 0 Unknown, 339 Unchecked, 1.0s Time] [2022-03-15 16:11:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-03-15 16:11:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1563. [2022-03-15 16:11:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.4161331626120357) internal successors, (5336), 1562 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5336 transitions. [2022-03-15 16:11:00,880 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5336 transitions. Word has length 24 [2022-03-15 16:11:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:00,881 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 5336 transitions. [2022-03-15 16:11:00,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5336 transitions. [2022-03-15 16:11:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:00,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:00,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:00,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 16:11:01,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:01,083 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -5292699, now seen corresponding path program 77 times [2022-03-15 16:11:01,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:01,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532750905] [2022-03-15 16:11:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:01,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:01,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532750905] [2022-03-15 16:11:01,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532750905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:01,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985844333] [2022-03-15 16:11:01,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:01,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:01,385 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:01,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 16:11:01,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:11:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,709 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 17 [2022-03-15 16:11:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:01,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:02,034 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:02,034 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 20 treesize of output 43 [2022-03-15 16:11:02,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:02,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:02,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:11:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:02,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985844333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:02,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:02,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:02,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114980304] [2022-03-15 16:11:02,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:02,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:02,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:02,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:02,099 INFO L87 Difference]: Start difference. First operand 1563 states and 5336 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:03,841 INFO L93 Difference]: Finished difference Result 2326 states and 7964 transitions. [2022-03-15 16:11:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:11:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:11:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:03,845 INFO L225 Difference]: With dead ends: 2326 [2022-03-15 16:11:03,845 INFO L226 Difference]: Without dead ends: 2318 [2022-03-15 16:11:03,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:11:03,846 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:03,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 106 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1743 Invalid, 0 Unknown, 952 Unchecked, 0.7s Time] [2022-03-15 16:11:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-03-15 16:11:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1564. [2022-03-15 16:11:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.417786308381318) internal successors, (5342), 1563 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5342 transitions. [2022-03-15 16:11:03,869 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5342 transitions. Word has length 24 [2022-03-15 16:11:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:03,869 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5342 transitions. [2022-03-15 16:11:03,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5342 transitions. [2022-03-15 16:11:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:03,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:03,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:03,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:04,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:04,072 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash -109982140, now seen corresponding path program 5 times [2022-03-15 16:11:04,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:04,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813318986] [2022-03-15 16:11:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:04,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:04,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:04,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813318986] [2022-03-15 16:11:04,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813318986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:04,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852429911] [2022-03-15 16:11:04,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:04,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:04,356 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:04,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 16:11:04,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:11:04,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:04,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:04,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:11:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:04,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:05,001 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:05,001 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 20 treesize of output 43 [2022-03-15 16:11:05,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:05,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:05,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:05,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:11:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:05,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852429911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:05,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:05,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:05,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068537452] [2022-03-15 16:11:05,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:05,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:05,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:05,072 INFO L87 Difference]: Start difference. First operand 1564 states and 5342 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:08,316 INFO L93 Difference]: Finished difference Result 3582 states and 12461 transitions. [2022-03-15 16:11:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:11:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:08,324 INFO L225 Difference]: With dead ends: 3582 [2022-03-15 16:11:08,324 INFO L226 Difference]: Without dead ends: 3574 [2022-03-15 16:11:08,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=697, Invalid=5003, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:11:08,325 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 734 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:08,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 180 Invalid, 3426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2560 Invalid, 0 Unknown, 734 Unchecked, 1.1s Time] [2022-03-15 16:11:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-03-15 16:11:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 1543. [2022-03-15 16:11:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.4163424124513617) internal successors, (5268), 1542 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 5268 transitions. [2022-03-15 16:11:08,360 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 5268 transitions. Word has length 24 [2022-03-15 16:11:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:08,360 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 5268 transitions. [2022-03-15 16:11:08,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 5268 transitions. [2022-03-15 16:11:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:08,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:08,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:08,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:08,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 16:11:08,587 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1904300301, now seen corresponding path program 78 times [2022-03-15 16:11:08,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:08,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580230829] [2022-03-15 16:11:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:08,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:08,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:08,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580230829] [2022-03-15 16:11:08,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580230829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:08,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093408642] [2022-03-15 16:11:08,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:08,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:08,844 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:08,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 16:11:08,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:11:08,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:11:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:09,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:09,387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-15 16:11:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:10,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:10,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-15 16:11:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:10,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093408642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:10,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:10,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:11:10,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797792980] [2022-03-15 16:11:10,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:10,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:11:10,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:11:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:11:10,480 INFO L87 Difference]: Start difference. First operand 1543 states and 5268 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:11,629 INFO L93 Difference]: Finished difference Result 1958 states and 6704 transitions. [2022-03-15 16:11:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:11:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:11:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:11,633 INFO L225 Difference]: With dead ends: 1958 [2022-03-15 16:11:11,633 INFO L226 Difference]: Without dead ends: 1952 [2022-03-15 16:11:11,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=2274, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:11:11,633 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1076 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:11,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 173 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 1076 Unchecked, 0.2s Time] [2022-03-15 16:11:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-03-15 16:11:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1625. [2022-03-15 16:11:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4538177339901477) internal successors, (5609), 1624 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5609 transitions. [2022-03-15 16:11:11,657 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5609 transitions. Word has length 24 [2022-03-15 16:11:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:11,657 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 5609 transitions. [2022-03-15 16:11:11,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5609 transitions. [2022-03-15 16:11:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:11,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:11,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:11,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:11,875 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,SelfDestructingSolverStorable135 [2022-03-15 16:11:11,875 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1475585507, now seen corresponding path program 79 times [2022-03-15 16:11:11,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:11,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080228281] [2022-03-15 16:11:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:12,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:12,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080228281] [2022-03-15 16:11:12,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080228281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:12,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585190255] [2022-03-15 16:11:12,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:12,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:12,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:12,128 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:12,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 16:11:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:12,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:12,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:12,433 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 37 treesize of output 21 [2022-03-15 16:11:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:12,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:12,711 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:12,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:11:12,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:12,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:12,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:12,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:12,772 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 20 treesize of output 3 [2022-03-15 16:11:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:12,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585190255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:12,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:12,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:12,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531916952] [2022-03-15 16:11:12,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:12,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:12,789 INFO L87 Difference]: Start difference. First operand 1625 states and 5609 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:15,793 INFO L93 Difference]: Finished difference Result 3914 states and 13821 transitions. [2022-03-15 16:11:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:11:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:15,801 INFO L225 Difference]: With dead ends: 3914 [2022-03-15 16:11:15,801 INFO L226 Difference]: Without dead ends: 3907 [2022-03-15 16:11:15,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=608, Invalid=4362, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:11:15,802 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:15,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 159 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2208 Invalid, 0 Unknown, 711 Unchecked, 1.0s Time] [2022-03-15 16:11:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-03-15 16:11:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 1562. [2022-03-15 16:11:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.4228058936579115) internal successors, (5343), 1561 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5343 transitions. [2022-03-15 16:11:15,833 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5343 transitions. Word has length 24 [2022-03-15 16:11:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:15,833 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5343 transitions. [2022-03-15 16:11:15,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5343 transitions. [2022-03-15 16:11:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:15,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:15,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:15,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 16:11:16,036 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,SelfDestructingSolverStorable136 [2022-03-15 16:11:16,036 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1011927326, now seen corresponding path program 11 times [2022-03-15 16:11:16,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:16,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853866156] [2022-03-15 16:11:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:16,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:16,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:16,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853866156] [2022-03-15 16:11:16,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853866156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:16,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480873357] [2022-03-15 16:11:16,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:16,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:16,298 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 16:11:16,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:11:16,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:16,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:11:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:16,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:16,888 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:16,889 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 20 treesize of output 43 [2022-03-15 16:11:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:16,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:16,945 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 20 treesize of output 3 [2022-03-15 16:11:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:16,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480873357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:16,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:16,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:16,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603310211] [2022-03-15 16:11:16,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:16,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:16,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:16,962 INFO L87 Difference]: Start difference. First operand 1562 states and 5343 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:18,655 INFO L93 Difference]: Finished difference Result 2864 states and 10083 transitions. [2022-03-15 16:11:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:11:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:18,661 INFO L225 Difference]: With dead ends: 2864 [2022-03-15 16:11:18,661 INFO L226 Difference]: Without dead ends: 2860 [2022-03-15 16:11:18,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:11:18,661 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:18,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 186 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1956 Invalid, 0 Unknown, 700 Unchecked, 0.8s Time] [2022-03-15 16:11:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-03-15 16:11:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1483. [2022-03-15 16:11:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.3920377867746287) internal successors, (5027), 1482 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5027 transitions. [2022-03-15 16:11:18,688 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5027 transitions. Word has length 24 [2022-03-15 16:11:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:18,688 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 5027 transitions. [2022-03-15 16:11:18,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5027 transitions. [2022-03-15 16:11:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:18,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:18,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:18,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 16:11:18,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:18,891 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash 50753249, now seen corresponding path program 80 times [2022-03-15 16:11:18,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:18,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276035442] [2022-03-15 16:11:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:19,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:19,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276035442] [2022-03-15 16:11:19,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276035442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:19,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226332268] [2022-03-15 16:11:19,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:11:19,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:19,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:19,106 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:19,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 16:11:19,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:11:19,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:11:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:19,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,643 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 21 [2022-03-15 16:11:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:19,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:20,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:20,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:11:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:20,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226332268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:20,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:20,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:11:20,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951895565] [2022-03-15 16:11:20,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:20,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:11:20,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:11:20,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:11:20,217 INFO L87 Difference]: Start difference. First operand 1483 states and 5027 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:21,609 INFO L93 Difference]: Finished difference Result 2603 states and 8217 transitions. [2022-03-15 16:11:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:11:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:11:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:21,614 INFO L225 Difference]: With dead ends: 2603 [2022-03-15 16:11:21,614 INFO L226 Difference]: Without dead ends: 2591 [2022-03-15 16:11:21,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=352, Invalid=3430, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:11:21,615 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:21,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 366 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1309 Invalid, 0 Unknown, 703 Unchecked, 0.5s Time] [2022-03-15 16:11:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-03-15 16:11:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1556. [2022-03-15 16:11:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.347909967845659) internal successors, (5206), 1555 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5206 transitions. [2022-03-15 16:11:21,641 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5206 transitions. Word has length 24 [2022-03-15 16:11:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:21,641 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5206 transitions. [2022-03-15 16:11:21,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5206 transitions. [2022-03-15 16:11:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:21,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:21,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:21,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 16:11:21,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:21,843 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2103294839, now seen corresponding path program 81 times [2022-03-15 16:11:21,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:21,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619244261] [2022-03-15 16:11:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:22,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:22,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619244261] [2022-03-15 16:11:22,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619244261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:22,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161516269] [2022-03-15 16:11:22,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:11:22,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:22,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:22,096 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:22,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 16:11:22,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:11:22,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:22,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:11:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:22,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:22,601 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 29 treesize of output 17 [2022-03-15 16:11:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:23,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:23,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:11:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:23,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161516269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:23,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:23,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:11:23,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134878502] [2022-03-15 16:11:23,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:23,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:11:23,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:23,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:11:23,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:11:23,178 INFO L87 Difference]: Start difference. First operand 1556 states and 5206 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:23,954 INFO L93 Difference]: Finished difference Result 2391 states and 7715 transitions. [2022-03-15 16:11:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:11:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:11:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:23,959 INFO L225 Difference]: With dead ends: 2391 [2022-03-15 16:11:23,959 INFO L226 Difference]: Without dead ends: 2380 [2022-03-15 16:11:23,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:11:23,959 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:23,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 219 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 715 Invalid, 0 Unknown, 567 Unchecked, 0.3s Time] [2022-03-15 16:11:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-03-15 16:11:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1604. [2022-03-15 16:11:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.315658140985652) internal successors, (5315), 1603 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5315 transitions. [2022-03-15 16:11:23,982 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5315 transitions. Word has length 24 [2022-03-15 16:11:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:23,982 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 5315 transitions. [2022-03-15 16:11:23,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5315 transitions. [2022-03-15 16:11:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:23,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:23,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:23,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:24,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 16:11:24,185 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash 927226883, now seen corresponding path program 82 times [2022-03-15 16:11:24,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:24,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148822416] [2022-03-15 16:11:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:24,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:24,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148822416] [2022-03-15 16:11:24,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148822416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:24,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796417620] [2022-03-15 16:11:24,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:11:24,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:24,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:24,393 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:24,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 16:11:24,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:11:24,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:24,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:24,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:24,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:24,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:24,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:11:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:24,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:24,997 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:24,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:11:25,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:25,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,049 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 20 treesize of output 3 [2022-03-15 16:11:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:25,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796417620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:25,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:25,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:11:25,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109888203] [2022-03-15 16:11:25,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:25,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:11:25,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:11:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:11:25,066 INFO L87 Difference]: Start difference. First operand 1604 states and 5315 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:26,606 INFO L93 Difference]: Finished difference Result 2451 states and 7860 transitions. [2022-03-15 16:11:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:11:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:11:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:26,612 INFO L225 Difference]: With dead ends: 2451 [2022-03-15 16:11:26,612 INFO L226 Difference]: Without dead ends: 2444 [2022-03-15 16:11:26,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:11:26,612 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:26,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 244 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2232 Invalid, 0 Unknown, 1199 Unchecked, 0.9s Time] [2022-03-15 16:11:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-03-15 16:11:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1555. [2022-03-15 16:11:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.3474903474903477) internal successors, (5202), 1554 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5202 transitions. [2022-03-15 16:11:26,646 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5202 transitions. Word has length 24 [2022-03-15 16:11:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:26,646 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5202 transitions. [2022-03-15 16:11:26,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5202 transitions. [2022-03-15 16:11:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:26,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:26,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:26,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:26,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:26,851 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash -295155111, now seen corresponding path program 83 times [2022-03-15 16:11:26,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:26,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511891749] [2022-03-15 16:11:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:27,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:27,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511891749] [2022-03-15 16:11:27,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511891749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:27,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617959769] [2022-03-15 16:11:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:27,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:27,082 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:27,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 16:11:27,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:11:27,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:27,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:27,400 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 17 [2022-03-15 16:11:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:27,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:27,698 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:27,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:11:27,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:27,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:27,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:27,747 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 20 treesize of output 3 [2022-03-15 16:11:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:27,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617959769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:27,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:27,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:11:27,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041428061] [2022-03-15 16:11:27,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:27,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:11:27,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:27,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:11:27,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:11:27,764 INFO L87 Difference]: Start difference. First operand 1555 states and 5202 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:29,117 INFO L93 Difference]: Finished difference Result 2045 states and 6666 transitions. [2022-03-15 16:11:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:11:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:11:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:29,121 INFO L225 Difference]: With dead ends: 2045 [2022-03-15 16:11:29,121 INFO L226 Difference]: Without dead ends: 2038 [2022-03-15 16:11:29,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:11:29,121 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1338 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:29,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 198 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1799 Invalid, 0 Unknown, 1338 Unchecked, 0.7s Time] [2022-03-15 16:11:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-03-15 16:11:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1566. [2022-03-15 16:11:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3405750798722043) internal successors, (5228), 1565 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5228 transitions. [2022-03-15 16:11:29,142 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5228 transitions. Word has length 24 [2022-03-15 16:11:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:29,142 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5228 transitions. [2022-03-15 16:11:29,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5228 transitions. [2022-03-15 16:11:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:29,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:29,144 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] [2022-03-15 16:11:29,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-15 16:11:29,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:29,345 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1559600685, now seen corresponding path program 84 times [2022-03-15 16:11:29,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:29,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690351264] [2022-03-15 16:11:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:29,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:29,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:29,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690351264] [2022-03-15 16:11:29,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690351264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:29,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650213049] [2022-03-15 16:11:29,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:29,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:29,559 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:29,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 16:11:29,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:11:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:11:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:30,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:30,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:30,116 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-03-15 16:11:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:30,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:30,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:30,717 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 37 treesize of output 7 [2022-03-15 16:11:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:30,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650213049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:30,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:30,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:11:30,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450736871] [2022-03-15 16:11:30,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:30,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:11:30,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:11:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:11:30,759 INFO L87 Difference]: Start difference. First operand 1566 states and 5228 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:33,658 INFO L93 Difference]: Finished difference Result 2641 states and 8716 transitions. [2022-03-15 16:11:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 16:11:33,659 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-03-15 16:11:33,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:33,663 INFO L225 Difference]: With dead ends: 2641 [2022-03-15 16:11:33,663 INFO L226 Difference]: Without dead ends: 2637 [2022-03-15 16:11:33,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=877, Invalid=6779, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:11:33,664 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 224 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:33,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 145 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1187 Invalid, 0 Unknown, 721 Unchecked, 0.6s Time] [2022-03-15 16:11:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-03-15 16:11:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1591. [2022-03-15 16:11:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3276729559748426) internal successors, (5291), 1590 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5291 transitions. [2022-03-15 16:11:33,693 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5291 transitions. Word has length 24 [2022-03-15 16:11:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:33,693 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5291 transitions. [2022-03-15 16:11:33,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5291 transitions. [2022-03-15 16:11:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:33,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:33,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:33,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 16:11:33,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:33,896 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash 938415252, now seen corresponding path program 12 times [2022-03-15 16:11:33,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:33,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265586180] [2022-03-15 16:11:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:34,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:34,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265586180] [2022-03-15 16:11:34,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265586180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:34,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738958047] [2022-03-15 16:11:34,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:34,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:34,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:34,110 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:34,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 16:11:34,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:11:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:11:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:34,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:34,671 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-03-15 16:11:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:34,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:35,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,278 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 37 treesize of output 7 [2022-03-15 16:11:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:35,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738958047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:35,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:35,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:11:35,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760888076] [2022-03-15 16:11:35,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:35,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:11:35,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:11:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:11:35,322 INFO L87 Difference]: Start difference. First operand 1591 states and 5291 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:39,570 INFO L93 Difference]: Finished difference Result 3196 states and 10645 transitions. [2022-03-15 16:11:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 16:11:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-03-15 16:11:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:39,576 INFO L225 Difference]: With dead ends: 3196 [2022-03-15 16:11:39,576 INFO L226 Difference]: Without dead ends: 3192 [2022-03-15 16:11:39,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1267, Invalid=9239, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 16:11:39,577 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 311 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1606 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:39,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 155 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1517 Invalid, 0 Unknown, 1606 Unchecked, 0.7s Time] [2022-03-15 16:11:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2022-03-15 16:11:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 1614. [2022-03-15 16:11:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.3161810291382516) internal successors, (5349), 1613 states have internal predecessors, (5349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5349 transitions. [2022-03-15 16:11:39,605 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5349 transitions. Word has length 24 [2022-03-15 16:11:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:39,605 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5349 transitions. [2022-03-15 16:11:39,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5349 transitions. [2022-03-15 16:11:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:39,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:39,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:39,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 16:11:39,808 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,SelfDestructingSolverStorable143 [2022-03-15 16:11:39,808 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 893357365, now seen corresponding path program 85 times [2022-03-15 16:11:39,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:39,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824811647] [2022-03-15 16:11:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:40,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:40,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824811647] [2022-03-15 16:11:40,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824811647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:40,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792314777] [2022-03-15 16:11:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:40,042 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:40,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 16:11:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:40,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:40,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:40,347 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 37 treesize of output 21 [2022-03-15 16:11:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:40,635 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:40,635 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 20 treesize of output 43 [2022-03-15 16:11:40,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:40,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,678 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 20 treesize of output 3 [2022-03-15 16:11:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:40,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792314777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:40,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:40,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:40,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191276783] [2022-03-15 16:11:40,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:40,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:40,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:40,696 INFO L87 Difference]: Start difference. First operand 1614 states and 5349 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:41,449 INFO L93 Difference]: Finished difference Result 2011 states and 6574 transitions. [2022-03-15 16:11:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:11:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:41,454 INFO L225 Difference]: With dead ends: 2011 [2022-03-15 16:11:41,454 INFO L226 Difference]: Without dead ends: 2005 [2022-03-15 16:11:41,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:11:41,455 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:41,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 132 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1036 Invalid, 0 Unknown, 858 Unchecked, 0.4s Time] [2022-03-15 16:11:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-03-15 16:11:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1605. [2022-03-15 16:11:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.321695760598504) internal successors, (5328), 1604 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5328 transitions. [2022-03-15 16:11:41,486 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5328 transitions. Word has length 24 [2022-03-15 16:11:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:41,487 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5328 transitions. [2022-03-15 16:11:41,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5328 transitions. [2022-03-15 16:11:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:41,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:41,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:41,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:41,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 16:11:41,711 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash -761953865, now seen corresponding path program 86 times [2022-03-15 16:11:41,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:41,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077329729] [2022-03-15 16:11:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:41,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:41,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:41,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077329729] [2022-03-15 16:11:41,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077329729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:41,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113952731] [2022-03-15 16:11:41,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:11:41,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:41,984 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:41,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 16:11:42,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:11:42,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:11:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:42,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:42,401 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:11:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:42,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:43,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:43,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:43,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:43,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:11:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:43,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113952731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:43,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:43,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:11:43,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128649651] [2022-03-15 16:11:43,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:11:43,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:11:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:11:43,184 INFO L87 Difference]: Start difference. First operand 1605 states and 5328 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:43,994 INFO L93 Difference]: Finished difference Result 3053 states and 10320 transitions. [2022-03-15 16:11:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:11:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:11:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:44,000 INFO L225 Difference]: With dead ends: 3053 [2022-03-15 16:11:44,000 INFO L226 Difference]: Without dead ends: 3044 [2022-03-15 16:11:44,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=1942, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:11:44,001 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 807 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:44,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 163 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 448 Invalid, 0 Unknown, 807 Unchecked, 0.2s Time] [2022-03-15 16:11:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-03-15 16:11:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1643. [2022-03-15 16:11:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.302070645554202) internal successors, (5422), 1642 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5422 transitions. [2022-03-15 16:11:44,028 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5422 transitions. Word has length 24 [2022-03-15 16:11:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:44,028 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 5422 transitions. [2022-03-15 16:11:44,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5422 transitions. [2022-03-15 16:11:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:44,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:44,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:44,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 16:11:44,230 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,SelfDestructingSolverStorable145 [2022-03-15 16:11:44,231 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -958467370, now seen corresponding path program 13 times [2022-03-15 16:11:44,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:44,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819518026] [2022-03-15 16:11:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:44,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:44,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819518026] [2022-03-15 16:11:44,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819518026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:44,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724361498] [2022-03-15 16:11:44,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:44,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:44,449 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:44,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 16:11:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:44,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:44,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:44,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-15 16:11:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:44,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:45,033 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:45,033 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 20 treesize of output 43 [2022-03-15 16:11:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:45,076 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 20 treesize of output 3 [2022-03-15 16:11:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:45,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724361498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:45,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:45,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:45,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458887974] [2022-03-15 16:11:45,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:45,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:45,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:45,093 INFO L87 Difference]: Start difference. First operand 1643 states and 5422 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:45,930 INFO L93 Difference]: Finished difference Result 2100 states and 6811 transitions. [2022-03-15 16:11:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:11:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:45,934 INFO L225 Difference]: With dead ends: 2100 [2022-03-15 16:11:45,934 INFO L226 Difference]: Without dead ends: 2096 [2022-03-15 16:11:45,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:11:45,934 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 239 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 787 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:45,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 126 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1069 Invalid, 0 Unknown, 787 Unchecked, 0.4s Time] [2022-03-15 16:11:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2022-03-15 16:11:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1624. [2022-03-15 16:11:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.311152187307455) internal successors, (5374), 1623 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5374 transitions. [2022-03-15 16:11:45,956 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5374 transitions. Word has length 24 [2022-03-15 16:11:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5374 transitions. [2022-03-15 16:11:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5374 transitions. [2022-03-15 16:11:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:45,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:45,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:45,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-15 16:11:46,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-15 16:11:46,159 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -199377759, now seen corresponding path program 87 times [2022-03-15 16:11:46,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:46,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31059875] [2022-03-15 16:11:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:46,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:46,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31059875] [2022-03-15 16:11:46,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31059875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:46,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419053834] [2022-03-15 16:11:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:11:46,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:46,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:46,413 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:46,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 16:11:46,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:11:46,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:46,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:46,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:46,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:46,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2022-03-15 16:11:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:46,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:47,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:47,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:47,395 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 45 treesize of output 7 [2022-03-15 16:11:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:47,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419053834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:47,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:47,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:11:47,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806724427] [2022-03-15 16:11:47,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:47,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:11:47,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:11:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:11:47,426 INFO L87 Difference]: Start difference. First operand 1624 states and 5374 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:51,429 INFO L93 Difference]: Finished difference Result 2836 states and 9082 transitions. [2022-03-15 16:11:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:11:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:11:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:51,434 INFO L225 Difference]: With dead ends: 2836 [2022-03-15 16:11:51,434 INFO L226 Difference]: Without dead ends: 2804 [2022-03-15 16:11:51,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=862, Invalid=7510, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:11:51,434 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 564 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1582 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:51,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 175 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2308 Invalid, 0 Unknown, 1582 Unchecked, 1.2s Time] [2022-03-15 16:11:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-03-15 16:11:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1642. [2022-03-15 16:11:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.3132236441194394) internal successors, (5437), 1641 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-03-15 16:11:51,459 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-03-15 16:11:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-03-15 16:11:51,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-03-15 16:11:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:51,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:51,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:51,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-15 16:11:51,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 16:11:51,661 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:51,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1736865753, now seen corresponding path program 88 times [2022-03-15 16:11:51,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:51,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296899197] [2022-03-15 16:11:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:51,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:51,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296899197] [2022-03-15 16:11:51,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296899197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:51,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653438119] [2022-03-15 16:11:51,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:11:51,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:51,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:51,916 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:51,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 16:11:51,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:11:51,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:52,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:52,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:52,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:52,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:52,213 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:11:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:52,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:52,486 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:11:52,486 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 20 treesize of output 43 [2022-03-15 16:11:52,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:52,534 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 20 treesize of output 3 [2022-03-15 16:11:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:52,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653438119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:52,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:52,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:11:52,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299641368] [2022-03-15 16:11:52,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:52,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:11:52,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:11:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:11:52,552 INFO L87 Difference]: Start difference. First operand 1642 states and 5437 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:53,887 INFO L93 Difference]: Finished difference Result 2119 states and 7012 transitions. [2022-03-15 16:11:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:11:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:11:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:53,891 INFO L225 Difference]: With dead ends: 2119 [2022-03-15 16:11:53,891 INFO L226 Difference]: Without dead ends: 2112 [2022-03-15 16:11:53,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:11:53,892 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:53,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 154 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1532 Invalid, 0 Unknown, 637 Unchecked, 0.6s Time] [2022-03-15 16:11:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-03-15 16:11:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1642. [2022-03-15 16:11:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.3132236441194394) internal successors, (5437), 1641 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-03-15 16:11:53,916 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-03-15 16:11:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:53,916 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-03-15 16:11:53,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-03-15 16:11:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:53,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:53,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:53,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 16:11:54,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-15 16:11:54,119 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1459870753, now seen corresponding path program 89 times [2022-03-15 16:11:54,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:54,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857842268] [2022-03-15 16:11:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:54,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:54,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857842268] [2022-03-15 16:11:54,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857842268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:54,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574073648] [2022-03-15 16:11:54,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:54,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:54,371 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:54,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 16:11:54,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:11:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:11:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:54,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:54,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2022-03-15 16:11:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:55,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:55,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:55,479 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 37 treesize of output 7 [2022-03-15 16:11:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:55,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574073648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:55,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:55,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:11:55,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275233293] [2022-03-15 16:11:55,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:55,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:11:55,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:11:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:11:55,521 INFO L87 Difference]: Start difference. First operand 1642 states and 5437 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:56,358 INFO L93 Difference]: Finished difference Result 2348 states and 7751 transitions. [2022-03-15 16:11:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:11:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 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 24 [2022-03-15 16:11:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:56,362 INFO L225 Difference]: With dead ends: 2348 [2022-03-15 16:11:56,362 INFO L226 Difference]: Without dead ends: 2341 [2022-03-15 16:11:56,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:11:56,363 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 813 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:56,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 127 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 616 Invalid, 0 Unknown, 813 Unchecked, 0.3s Time] [2022-03-15 16:11:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-03-15 16:11:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1653. [2022-03-15 16:11:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.305084745762712) internal successors, (5460), 1652 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5460 transitions. [2022-03-15 16:11:56,388 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5460 transitions. Word has length 24 [2022-03-15 16:11:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:56,388 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 5460 transitions. [2022-03-15 16:11:56,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5460 transitions. [2022-03-15 16:11:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:56,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:56,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:56,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:56,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-15 16:11:56,591 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 988875043, now seen corresponding path program 90 times [2022-03-15 16:11:56,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:56,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573653166] [2022-03-15 16:11:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:56,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:56,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:56,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573653166] [2022-03-15 16:11:56,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573653166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:56,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015015938] [2022-03-15 16:11:56,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:56,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:56,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:56,847 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:56,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 16:11:56,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:11:56,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:11:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:57,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:57,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:57,121 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:11:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:57,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:57,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:57,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:57,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:11:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:57,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015015938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:57,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:57,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:11:57,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117042002] [2022-03-15 16:11:57,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:11:57,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:11:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:11:57,871 INFO L87 Difference]: Start difference. First operand 1653 states and 5460 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:59,115 INFO L93 Difference]: Finished difference Result 1924 states and 6308 transitions. [2022-03-15 16:11:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:11:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:11:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:59,118 INFO L225 Difference]: With dead ends: 1924 [2022-03-15 16:11:59,118 INFO L226 Difference]: Without dead ends: 1918 [2022-03-15 16:11:59,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:11:59,119 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:59,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1553 Invalid, 0 Unknown, 262 Unchecked, 0.6s Time] [2022-03-15 16:11:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-03-15 16:11:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1654. [2022-03-15 16:11:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.3042952208106473) internal successors, (5462), 1653 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5462 transitions. [2022-03-15 16:11:59,138 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5462 transitions. Word has length 24 [2022-03-15 16:11:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:59,138 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5462 transitions. [2022-03-15 16:11:59,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5462 transitions. [2022-03-15 16:11:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:11:59,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:59,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:59,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:59,341 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,SelfDestructingSolverStorable150 [2022-03-15 16:11:59,341 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:11:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 626132313, now seen corresponding path program 91 times [2022-03-15 16:11:59,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:59,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795845221] [2022-03-15 16:11:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:59,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:59,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795845221] [2022-03-15 16:11:59,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795845221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:59,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230878675] [2022-03-15 16:11:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:59,597 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:59,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 16:11:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:11:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:59,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:59,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:59,819 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 30 treesize of output 16 [2022-03-15 16:11:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:00,140 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:00,140 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 20 treesize of output 43 [2022-03-15 16:12:00,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:00,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:00,200 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 20 treesize of output 3 [2022-03-15 16:12:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:00,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230878675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:00,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:00,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:00,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969252790] [2022-03-15 16:12:00,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:00,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:00,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:00,217 INFO L87 Difference]: Start difference. First operand 1654 states and 5462 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:01,294 INFO L93 Difference]: Finished difference Result 1970 states and 6486 transitions. [2022-03-15 16:12:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:12:01,294 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:12:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:01,298 INFO L225 Difference]: With dead ends: 1970 [2022-03-15 16:12:01,298 INFO L226 Difference]: Without dead ends: 1966 [2022-03-15 16:12:01,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:12:01,298 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:01,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1418 Invalid, 0 Unknown, 196 Unchecked, 0.6s Time] [2022-03-15 16:12:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-03-15 16:12:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1662. [2022-03-15 16:12:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.299819385912101) internal successors, (5481), 1661 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5481 transitions. [2022-03-15 16:12:01,319 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5481 transitions. Word has length 24 [2022-03-15 16:12:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:01,319 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 5481 transitions. [2022-03-15 16:12:01,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5481 transitions. [2022-03-15 16:12:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:01,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:01,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:01,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 16:12:01,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:01,522 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:01,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1513635994, now seen corresponding path program 14 times [2022-03-15 16:12:01,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:01,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356543665] [2022-03-15 16:12:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:01,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:01,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:01,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356543665] [2022-03-15 16:12:01,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356543665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:01,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777995030] [2022-03-15 16:12:01,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:01,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:01,789 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:01,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 16:12:01,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:02,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:02,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:02,075 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-03-15 16:12:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:02,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:02,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:02,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:02,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:12:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:02,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777995030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:02,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:02,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:12:02,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473871986] [2022-03-15 16:12:02,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:02,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:12:02,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:12:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:12:02,909 INFO L87 Difference]: Start difference. First operand 1662 states and 5481 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:04,585 INFO L93 Difference]: Finished difference Result 1974 states and 6440 transitions. [2022-03-15 16:12:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:12:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 24 [2022-03-15 16:12:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:04,589 INFO L225 Difference]: With dead ends: 1974 [2022-03-15 16:12:04,589 INFO L226 Difference]: Without dead ends: 1960 [2022-03-15 16:12:04,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:12:04,590 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:04,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 129 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2035 Invalid, 0 Unknown, 416 Unchecked, 0.9s Time] [2022-03-15 16:12:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-03-15 16:12:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1657. [2022-03-15 16:12:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.301328502415459) internal successors, (5467), 1656 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5467 transitions. [2022-03-15 16:12:04,612 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5467 transitions. Word has length 24 [2022-03-15 16:12:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:04,612 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5467 transitions. [2022-03-15 16:12:04,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5467 transitions. [2022-03-15 16:12:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:04,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:04,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:04,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 16:12:04,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:04,814 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1320486233, now seen corresponding path program 92 times [2022-03-15 16:12:04,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:04,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890581458] [2022-03-15 16:12:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:05,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:05,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890581458] [2022-03-15 16:12:05,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890581458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:05,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210008404] [2022-03-15 16:12:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:05,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:05,042 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:05,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 16:12:05,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:05,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:05,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:05,597 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 21 [2022-03-15 16:12:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:05,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:05,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:06,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:06,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:12:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:06,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210008404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:06,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:06,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:12:06,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175881798] [2022-03-15 16:12:06,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:06,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:12:06,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:12:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:12:06,099 INFO L87 Difference]: Start difference. First operand 1657 states and 5467 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:08,203 INFO L93 Difference]: Finished difference Result 2230 states and 7183 transitions. [2022-03-15 16:12:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:12:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:12:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:08,207 INFO L225 Difference]: With dead ends: 2230 [2022-03-15 16:12:08,207 INFO L226 Difference]: Without dead ends: 2226 [2022-03-15 16:12:08,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=451, Invalid=5099, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:12:08,208 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:08,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 231 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1862 Invalid, 0 Unknown, 1149 Unchecked, 0.8s Time] [2022-03-15 16:12:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-03-15 16:12:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1705. [2022-03-15 16:12:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.2822769953051645) internal successors, (5593), 1704 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5593 transitions. [2022-03-15 16:12:08,230 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5593 transitions. Word has length 24 [2022-03-15 16:12:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:08,230 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5593 transitions. [2022-03-15 16:12:08,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5593 transitions. [2022-03-15 16:12:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:08,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:08,232 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] [2022-03-15 16:12:08,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-15 16:12:08,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:08,433 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:08,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1710035489, now seen corresponding path program 93 times [2022-03-15 16:12:08,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:08,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33986710] [2022-03-15 16:12:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:08,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:08,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:08,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33986710] [2022-03-15 16:12:08,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33986710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:08,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307956385] [2022-03-15 16:12:08,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:08,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:08,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:08,651 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:08,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 16:12:08,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:12:08,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:08,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:08,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:08,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:08,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:08,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:12:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:09,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:09,270 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:09,270 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 20 treesize of output 43 [2022-03-15 16:12:09,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:09,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,316 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 20 treesize of output 3 [2022-03-15 16:12:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:09,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307956385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:09,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:09,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:12:09,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912219115] [2022-03-15 16:12:09,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:09,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:12:09,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:12:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:12:09,333 INFO L87 Difference]: Start difference. First operand 1705 states and 5593 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:10,463 INFO L93 Difference]: Finished difference Result 2122 states and 6832 transitions. [2022-03-15 16:12:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:12:10,463 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:12:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:10,467 INFO L225 Difference]: With dead ends: 2122 [2022-03-15 16:12:10,467 INFO L226 Difference]: Without dead ends: 2115 [2022-03-15 16:12:10,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:12:10,467 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:10,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 169 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1657 Invalid, 0 Unknown, 731 Unchecked, 0.7s Time] [2022-03-15 16:12:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-03-15 16:12:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1722. [2022-03-15 16:12:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 3.2783265543288787) internal successors, (5642), 1721 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 5642 transitions. [2022-03-15 16:12:10,489 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 5642 transitions. Word has length 24 [2022-03-15 16:12:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:10,489 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 5642 transitions. [2022-03-15 16:12:10,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 5642 transitions. [2022-03-15 16:12:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:10,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:10,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:10,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:10,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:10,692 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash -131973757, now seen corresponding path program 94 times [2022-03-15 16:12:10,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:10,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801429489] [2022-03-15 16:12:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:10,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:10,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801429489] [2022-03-15 16:12:10,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801429489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:10,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175544465] [2022-03-15 16:12:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:12:10,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:10,904 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:10,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 16:12:10,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:12:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:10,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:11,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:11,219 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 17 [2022-03-15 16:12:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:11,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:11,494 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:11,494 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 20 treesize of output 43 [2022-03-15 16:12:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:11,549 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 20 treesize of output 3 [2022-03-15 16:12:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:11,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175544465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:11,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:11,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:11,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156881028] [2022-03-15 16:12:11,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:11,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:11,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:11,566 INFO L87 Difference]: Start difference. First operand 1722 states and 5642 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:12,337 INFO L93 Difference]: Finished difference Result 2155 states and 7039 transitions. [2022-03-15 16:12:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 16:12:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:12,342 INFO L225 Difference]: With dead ends: 2155 [2022-03-15 16:12:12,342 INFO L226 Difference]: Without dead ends: 2149 [2022-03-15 16:12:12,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:12:12,342 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 187 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:12,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 129 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1085 Invalid, 0 Unknown, 1184 Unchecked, 0.4s Time] [2022-03-15 16:12:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-03-15 16:12:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1710. [2022-03-15 16:12:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.2826214160327676) internal successors, (5610), 1709 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5610 transitions. [2022-03-15 16:12:12,372 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5610 transitions. Word has length 24 [2022-03-15 16:12:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:12,372 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5610 transitions. [2022-03-15 16:12:12,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5610 transitions. [2022-03-15 16:12:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:12,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:12,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:12,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:12,575 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,SelfDestructingSolverStorable155 [2022-03-15 16:12:12,575 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1017772037, now seen corresponding path program 95 times [2022-03-15 16:12:12,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:12,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157683152] [2022-03-15 16:12:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:12,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:12,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157683152] [2022-03-15 16:12:12,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157683152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:12,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20216283] [2022-03-15 16:12:12,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:12:12,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:12,836 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:12,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 16:12:12,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:12:12,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:13,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:13,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:13,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:13,152 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 17 [2022-03-15 16:12:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:13,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:13,434 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:13,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:12:13,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:13,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:13,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:12:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:13,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20216283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:13,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:13,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:13,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783405107] [2022-03-15 16:12:13,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:13,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:13,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:13,511 INFO L87 Difference]: Start difference. First operand 1710 states and 5610 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:14,299 INFO L93 Difference]: Finished difference Result 2050 states and 6701 transitions. [2022-03-15 16:12:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:12:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:14,303 INFO L225 Difference]: With dead ends: 2050 [2022-03-15 16:12:14,303 INFO L226 Difference]: Without dead ends: 2043 [2022-03-15 16:12:14,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:12:14,303 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:14,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1090 Invalid, 0 Unknown, 295 Unchecked, 0.4s Time] [2022-03-15 16:12:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-03-15 16:12:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1730. [2022-03-15 16:12:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.282244071717756) internal successors, (5675), 1729 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5675 transitions. [2022-03-15 16:12:14,324 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5675 transitions. Word has length 24 [2022-03-15 16:12:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:14,324 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5675 transitions. [2022-03-15 16:12:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5675 transitions. [2022-03-15 16:12:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:14,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:14,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:14,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-15 16:12:14,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:14,527 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1621884029, now seen corresponding path program 96 times [2022-03-15 16:12:14,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:14,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790755179] [2022-03-15 16:12:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:14,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:14,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790755179] [2022-03-15 16:12:14,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790755179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:14,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307714306] [2022-03-15 16:12:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:12:14,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:14,749 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:14,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 16:12:14,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:12:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:14,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:12:14,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:15,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:15,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:15,318 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-03-15 16:12:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:16,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:16,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:16,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:16,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:16,217 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-15 16:12:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:16,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307714306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:16,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:16,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:12:16,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282738520] [2022-03-15 16:12:16,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:16,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:12:16,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:12:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:12:16,260 INFO L87 Difference]: Start difference. First operand 1730 states and 5675 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:18,006 INFO L93 Difference]: Finished difference Result 2441 states and 7966 transitions. [2022-03-15 16:12:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:12:18,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:12:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:18,021 INFO L225 Difference]: With dead ends: 2441 [2022-03-15 16:12:18,021 INFO L226 Difference]: Without dead ends: 2432 [2022-03-15 16:12:18,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:12:18,021 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1732 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:18,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 159 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 503 Invalid, 0 Unknown, 1732 Unchecked, 0.2s Time] [2022-03-15 16:12:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-03-15 16:12:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1815. [2022-03-15 16:12:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 3.2662624035281147) internal successors, (5925), 1814 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 5925 transitions. [2022-03-15 16:12:18,044 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 5925 transitions. Word has length 24 [2022-03-15 16:12:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:18,044 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 5925 transitions. [2022-03-15 16:12:18,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 5925 transitions. [2022-03-15 16:12:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:18,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:18,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:18,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-15 16:12:18,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 16:12:18,247 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:18,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2008343658, now seen corresponding path program 15 times [2022-03-15 16:12:18,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:18,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116852545] [2022-03-15 16:12:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:18,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:18,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116852545] [2022-03-15 16:12:18,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116852545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:18,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089162987] [2022-03-15 16:12:18,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:18,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:18,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:18,489 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:18,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 16:12:18,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:12:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:18,968 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 29 treesize of output 17 [2022-03-15 16:12:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:19,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:19,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:19,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:19,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:12:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:19,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089162987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:19,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:19,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:12:19,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672341957] [2022-03-15 16:12:19,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:19,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:12:19,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:12:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:12:19,490 INFO L87 Difference]: Start difference. First operand 1815 states and 5925 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:22,062 INFO L93 Difference]: Finished difference Result 2571 states and 8240 transitions. [2022-03-15 16:12:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:12:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:12:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:22,067 INFO L225 Difference]: With dead ends: 2571 [2022-03-15 16:12:22,067 INFO L226 Difference]: Without dead ends: 2561 [2022-03-15 16:12:22,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=531, Invalid=5321, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:12:22,068 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 233 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:22,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 263 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1847 Invalid, 0 Unknown, 951 Unchecked, 0.8s Time] [2022-03-15 16:12:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-03-15 16:12:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1846. [2022-03-15 16:12:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.2531165311653116) internal successors, (6002), 1845 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6002 transitions. [2022-03-15 16:12:22,094 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6002 transitions. Word has length 24 [2022-03-15 16:12:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:22,095 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6002 transitions. [2022-03-15 16:12:22,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6002 transitions. [2022-03-15 16:12:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:22,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:22,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:22,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:22,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 16:12:22,298 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1008952667, now seen corresponding path program 97 times [2022-03-15 16:12:22,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:22,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207340217] [2022-03-15 16:12:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:22,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:22,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:22,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207340217] [2022-03-15 16:12:22,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207340217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:22,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311477141] [2022-03-15 16:12:22,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:12:22,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:22,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:22,524 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:22,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 16:12:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:22,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:22,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:22,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:22,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:22,840 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 37 treesize of output 21 [2022-03-15 16:12:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:22,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:23,121 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:23,121 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 20 treesize of output 43 [2022-03-15 16:12:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:23,177 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 20 treesize of output 3 [2022-03-15 16:12:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:23,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311477141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:23,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:23,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:23,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216938574] [2022-03-15 16:12:23,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:23,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:23,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:23,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:23,194 INFO L87 Difference]: Start difference. First operand 1846 states and 6002 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:23,904 INFO L93 Difference]: Finished difference Result 2249 states and 7227 transitions. [2022-03-15 16:12:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:12:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:23,909 INFO L225 Difference]: With dead ends: 2249 [2022-03-15 16:12:23,909 INFO L226 Difference]: Without dead ends: 2242 [2022-03-15 16:12:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:12:23,909 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 98 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 855 Invalid, 0 Unknown, 365 Unchecked, 0.4s Time] [2022-03-15 16:12:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-03-15 16:12:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1858. [2022-03-15 16:12:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.253096392030156) internal successors, (6041), 1857 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6041 transitions. [2022-03-15 16:12:23,943 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6041 transitions. Word has length 24 [2022-03-15 16:12:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:23,943 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6041 transitions. [2022-03-15 16:12:23,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6041 transitions. [2022-03-15 16:12:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:23,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:23,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:23,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-15 16:12:24,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:24,147 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -3739865, now seen corresponding path program 98 times [2022-03-15 16:12:24,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:24,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386505211] [2022-03-15 16:12:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:24,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:24,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:24,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386505211] [2022-03-15 16:12:24,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386505211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:24,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701982973] [2022-03-15 16:12:24,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:24,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:24,391 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:24,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 16:12:24,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:24,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:24,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:24,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:24,743 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:12:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:24,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:25,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:25,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:25,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:25,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:12:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:25,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701982973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:25,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:25,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:12:25,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693537603] [2022-03-15 16:12:25,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:25,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:12:25,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:12:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:12:25,556 INFO L87 Difference]: Start difference. First operand 1858 states and 6041 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:27,316 INFO L93 Difference]: Finished difference Result 2943 states and 9800 transitions. [2022-03-15 16:12:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:12:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:12:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:27,321 INFO L225 Difference]: With dead ends: 2943 [2022-03-15 16:12:27,321 INFO L226 Difference]: Without dead ends: 2933 [2022-03-15 16:12:27,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:12:27,321 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:27,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 183 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 535 Invalid, 0 Unknown, 1166 Unchecked, 0.3s Time] [2022-03-15 16:12:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-03-15 16:12:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1873. [2022-03-15 16:12:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.2542735042735043) internal successors, (6092), 1872 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6092 transitions. [2022-03-15 16:12:27,347 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6092 transitions. Word has length 24 [2022-03-15 16:12:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 6092 transitions. [2022-03-15 16:12:27,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6092 transitions. [2022-03-15 16:12:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:27,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:27,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:27,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-15 16:12:27,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-03-15 16:12:27,550 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1310540155, now seen corresponding path program 99 times [2022-03-15 16:12:27,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:27,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595284800] [2022-03-15 16:12:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:27,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:27,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:27,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595284800] [2022-03-15 16:12:27,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595284800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:27,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657100672] [2022-03-15 16:12:27,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:27,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:27,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:27,809 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:27,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 16:12:27,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:12:27,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:27,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:28,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:28,184 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 21 [2022-03-15 16:12:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:28,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:28,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:28,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:28,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:12:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:28,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657100672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:28,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:28,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:12:28,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229725208] [2022-03-15 16:12:28,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:28,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:12:28,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:12:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:12:28,760 INFO L87 Difference]: Start difference. First operand 1873 states and 6092 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:29,977 INFO L93 Difference]: Finished difference Result 2232 states and 7157 transitions. [2022-03-15 16:12:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:12:29,978 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:12:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:29,992 INFO L225 Difference]: With dead ends: 2232 [2022-03-15 16:12:29,992 INFO L226 Difference]: Without dead ends: 2226 [2022-03-15 16:12:29,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:12:29,992 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:29,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 148 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1310 Invalid, 0 Unknown, 689 Unchecked, 0.6s Time] [2022-03-15 16:12:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-03-15 16:12:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1877. [2022-03-15 16:12:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.2510660980810235) internal successors, (6099), 1876 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6099 transitions. [2022-03-15 16:12:30,015 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6099 transitions. Word has length 24 [2022-03-15 16:12:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:30,015 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6099 transitions. [2022-03-15 16:12:30,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6099 transitions. [2022-03-15 16:12:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:30,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:30,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:30,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-15 16:12:30,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:30,219 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:30,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash 230032295, now seen corresponding path program 100 times [2022-03-15 16:12:30,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:30,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387190471] [2022-03-15 16:12:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:30,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:30,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:30,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387190471] [2022-03-15 16:12:30,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387190471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:30,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18885766] [2022-03-15 16:12:30,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:12:30,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:30,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:30,467 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:30,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 16:12:30,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:12:30,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:30,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:30,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:30,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:30,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:30,739 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 33 treesize of output 17 [2022-03-15 16:12:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:30,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:31,071 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:31,071 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 20 treesize of output 43 [2022-03-15 16:12:31,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:31,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,115 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 20 treesize of output 3 [2022-03-15 16:12:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:31,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18885766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:31,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:31,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:31,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537255746] [2022-03-15 16:12:31,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:31,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:31,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:31,132 INFO L87 Difference]: Start difference. First operand 1877 states and 6099 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:32,292 INFO L93 Difference]: Finished difference Result 2214 states and 7180 transitions. [2022-03-15 16:12:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:12:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:12:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:32,297 INFO L225 Difference]: With dead ends: 2214 [2022-03-15 16:12:32,297 INFO L226 Difference]: Without dead ends: 2204 [2022-03-15 16:12:32,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:12:32,297 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:32,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 65 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1304 Invalid, 0 Unknown, 654 Unchecked, 0.6s Time] [2022-03-15 16:12:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-03-15 16:12:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1893. [2022-03-15 16:12:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.2510570824524314) internal successors, (6151), 1892 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6151 transitions. [2022-03-15 16:12:32,323 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6151 transitions. Word has length 24 [2022-03-15 16:12:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:32,323 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 6151 transitions. [2022-03-15 16:12:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6151 transitions. [2022-03-15 16:12:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:32,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:32,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:32,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-15 16:12:32,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:32,526 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash 715549660, now seen corresponding path program 6 times [2022-03-15 16:12:32,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:32,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263443280] [2022-03-15 16:12:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:32,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:32,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:32,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263443280] [2022-03-15 16:12:32,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263443280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:32,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548122856] [2022-03-15 16:12:32,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:12:32,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:32,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:32,766 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:32,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 16:12:32,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:12:32,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:32,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:12:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:33,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:33,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:33,340 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-15 16:12:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:33,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:34,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,253 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 37 treesize of output 7 [2022-03-15 16:12:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:34,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548122856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:34,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:34,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:12:34,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087069498] [2022-03-15 16:12:34,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:34,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:12:34,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:12:34,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:12:34,299 INFO L87 Difference]: Start difference. First operand 1893 states and 6151 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:35,004 INFO L93 Difference]: Finished difference Result 2227 states and 7098 transitions. [2022-03-15 16:12:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:12:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:12:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:35,009 INFO L225 Difference]: With dead ends: 2227 [2022-03-15 16:12:35,009 INFO L226 Difference]: Without dead ends: 2225 [2022-03-15 16:12:35,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:12:35,010 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:35,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 129 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 524 Unchecked, 0.1s Time] [2022-03-15 16:12:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-03-15 16:12:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1964. [2022-03-15 16:12:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.247580234335201) internal successors, (6375), 1963 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6375 transitions. [2022-03-15 16:12:35,036 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6375 transitions. Word has length 24 [2022-03-15 16:12:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:35,036 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6375 transitions. [2022-03-15 16:12:35,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6375 transitions. [2022-03-15 16:12:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:35,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:35,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:35,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-15 16:12:35,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:35,240 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1105807064, now seen corresponding path program 7 times [2022-03-15 16:12:35,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:35,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315548617] [2022-03-15 16:12:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:35,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:35,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:35,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315548617] [2022-03-15 16:12:35,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315548617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:35,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63335387] [2022-03-15 16:12:35,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:12:35,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:35,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:35,489 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 16:12:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:35,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:35,783 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 37 treesize of output 21 [2022-03-15 16:12:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:35,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:36,065 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:36,065 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 20 treesize of output 43 [2022-03-15 16:12:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:36,110 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 20 treesize of output 3 [2022-03-15 16:12:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:36,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63335387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:36,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:36,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:36,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588322490] [2022-03-15 16:12:36,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:36,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:36,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:36,128 INFO L87 Difference]: Start difference. First operand 1964 states and 6375 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:36,994 INFO L93 Difference]: Finished difference Result 2382 states and 7597 transitions. [2022-03-15 16:12:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:12:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:12:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:36,998 INFO L225 Difference]: With dead ends: 2382 [2022-03-15 16:12:36,998 INFO L226 Difference]: Without dead ends: 2377 [2022-03-15 16:12:36,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:12:36,999 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:36,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1288 Invalid, 0 Unknown, 290 Unchecked, 0.5s Time] [2022-03-15 16:12:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-03-15 16:12:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1965. [2022-03-15 16:12:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 3.24847250509165) internal successors, (6380), 1964 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 6380 transitions. [2022-03-15 16:12:37,022 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 6380 transitions. Word has length 24 [2022-03-15 16:12:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:37,023 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 6380 transitions. [2022-03-15 16:12:37,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 6380 transitions. [2022-03-15 16:12:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:37,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:37,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:37,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-15 16:12:37,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:37,226 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1091904803, now seen corresponding path program 1 times [2022-03-15 16:12:37,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:37,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298407543] [2022-03-15 16:12:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:37,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:37,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298407543] [2022-03-15 16:12:37,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298407543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:37,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722042845] [2022-03-15 16:12:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:37,504 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:37,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 16:12:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:37,815 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 37 treesize of output 21 [2022-03-15 16:12:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:38,098 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:38,098 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 20 treesize of output 43 [2022-03-15 16:12:38,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:38,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:38,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:12:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:38,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722042845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:38,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:38,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:38,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232510767] [2022-03-15 16:12:38,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:38,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:38,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:38,160 INFO L87 Difference]: Start difference. First operand 1965 states and 6380 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:39,037 INFO L93 Difference]: Finished difference Result 2285 states and 7368 transitions. [2022-03-15 16:12:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:12:39,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:39,042 INFO L225 Difference]: With dead ends: 2285 [2022-03-15 16:12:39,042 INFO L226 Difference]: Without dead ends: 2281 [2022-03-15 16:12:39,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:12:39,042 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:39,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 272 Unchecked, 0.4s Time] [2022-03-15 16:12:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-03-15 16:12:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1963. [2022-03-15 16:12:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.2487257900101936) internal successors, (6374), 1962 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6374 transitions. [2022-03-15 16:12:39,066 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6374 transitions. Word has length 24 [2022-03-15 16:12:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:39,066 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 6374 transitions. [2022-03-15 16:12:39,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6374 transitions. [2022-03-15 16:12:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:39,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:39,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:39,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 16:12:39,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:39,269 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash -297142872, now seen corresponding path program 8 times [2022-03-15 16:12:39,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:39,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762208369] [2022-03-15 16:12:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:39,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:39,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762208369] [2022-03-15 16:12:39,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762208369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:39,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083976706] [2022-03-15 16:12:39,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:39,524 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 16:12:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:39,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:39,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:39,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:39,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:39,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:39,881 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:12:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:40,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:40,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:40,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:40,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:40,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:12:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:40,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083976706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:40,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:40,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:12:40,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586656350] [2022-03-15 16:12:40,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:40,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:12:40,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:12:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:12:40,688 INFO L87 Difference]: Start difference. First operand 1963 states and 6374 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:43,009 INFO L93 Difference]: Finished difference Result 3351 states and 11150 transitions. [2022-03-15 16:12:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:12:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:12:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:43,016 INFO L225 Difference]: With dead ends: 3351 [2022-03-15 16:12:43,016 INFO L226 Difference]: Without dead ends: 3341 [2022-03-15 16:12:43,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=576, Invalid=3456, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:12:43,016 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 179 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1809 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:43,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 314 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1027 Invalid, 0 Unknown, 1809 Unchecked, 0.5s Time] [2022-03-15 16:12:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2022-03-15 16:12:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2001. [2022-03-15 16:12:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 3.249) internal successors, (6498), 2000 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6498 transitions. [2022-03-15 16:12:43,060 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6498 transitions. Word has length 24 [2022-03-15 16:12:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:43,060 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 6498 transitions. [2022-03-15 16:12:43,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6498 transitions. [2022-03-15 16:12:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:43,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:43,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:43,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-15 16:12:43,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:43,263 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2104597335, now seen corresponding path program 2 times [2022-03-15 16:12:43,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:43,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212400029] [2022-03-15 16:12:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:43,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:43,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:43,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212400029] [2022-03-15 16:12:43,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212400029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:43,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835034609] [2022-03-15 16:12:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:43,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:43,508 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:43,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 16:12:43,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:43,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:43,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:43,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:43,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:43,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:43,862 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:12:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:44,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:44,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:44,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:44,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:44,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:12:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:44,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835034609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:44,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:44,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:12:44,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996039128] [2022-03-15 16:12:44,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:44,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:12:44,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:44,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:12:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:12:44,681 INFO L87 Difference]: Start difference. First operand 2001 states and 6498 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:45,820 INFO L93 Difference]: Finished difference Result 2462 states and 8050 transitions. [2022-03-15 16:12:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:12:45,820 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 24 [2022-03-15 16:12:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:45,825 INFO L225 Difference]: With dead ends: 2462 [2022-03-15 16:12:45,825 INFO L226 Difference]: Without dead ends: 2454 [2022-03-15 16:12:45,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:12:45,825 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:45,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 176 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 582 Invalid, 0 Unknown, 743 Unchecked, 0.3s Time] [2022-03-15 16:12:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-03-15 16:12:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2003. [2022-03-15 16:12:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.247752247752248) internal successors, (6502), 2002 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6502 transitions. [2022-03-15 16:12:45,850 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6502 transitions. Word has length 24 [2022-03-15 16:12:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:45,850 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6502 transitions. [2022-03-15 16:12:45,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6502 transitions. [2022-03-15 16:12:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:45,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:45,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:45,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-15 16:12:46,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 16:12:46,054 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1017137148, now seen corresponding path program 9 times [2022-03-15 16:12:46,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:46,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112161623] [2022-03-15 16:12:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:46,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:46,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:46,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112161623] [2022-03-15 16:12:46,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112161623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:46,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096360283] [2022-03-15 16:12:46,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:46,297 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:46,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 16:12:46,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:12:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:46,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:46,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:46,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:12:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:46,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:47,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:47,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:47,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:12:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:47,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096360283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:47,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:47,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:12:47,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132677262] [2022-03-15 16:12:47,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:47,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:12:47,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:12:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:12:47,219 INFO L87 Difference]: Start difference. First operand 2003 states and 6502 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:48,146 INFO L93 Difference]: Finished difference Result 2324 states and 7479 transitions. [2022-03-15 16:12:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:12:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:12:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:48,150 INFO L225 Difference]: With dead ends: 2324 [2022-03-15 16:12:48,151 INFO L226 Difference]: Without dead ends: 2319 [2022-03-15 16:12:48,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:12:48,151 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:48,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 141 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1354 Invalid, 0 Unknown, 821 Unchecked, 0.6s Time] [2022-03-15 16:12:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-03-15 16:12:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2002. [2022-03-15 16:12:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.2478760619690155) internal successors, (6499), 2001 states have internal predecessors, (6499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6499 transitions. [2022-03-15 16:12:48,176 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6499 transitions. Word has length 24 [2022-03-15 16:12:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:48,176 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 6499 transitions. [2022-03-15 16:12:48,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6499 transitions. [2022-03-15 16:12:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:48,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:48,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:48,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-15 16:12:48,379 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,SelfDestructingSolverStorable168 [2022-03-15 16:12:48,379 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -516236142, now seen corresponding path program 16 times [2022-03-15 16:12:48,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:48,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148968287] [2022-03-15 16:12:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:48,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:48,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148968287] [2022-03-15 16:12:48,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148968287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:48,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181688056] [2022-03-15 16:12:48,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:12:48,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:48,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:48,676 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:48,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 16:12:48,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:12:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:49,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:49,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:49,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:49,003 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 17 [2022-03-15 16:12:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:49,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:49,283 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:49,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:12:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:49,325 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 20 treesize of output 3 [2022-03-15 16:12:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:49,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181688056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:49,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:49,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:49,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64384674] [2022-03-15 16:12:49,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:49,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:49,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:49,343 INFO L87 Difference]: Start difference. First operand 2002 states and 6499 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:50,278 INFO L93 Difference]: Finished difference Result 2438 states and 7772 transitions. [2022-03-15 16:12:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:12:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:50,283 INFO L225 Difference]: With dead ends: 2438 [2022-03-15 16:12:50,283 INFO L226 Difference]: Without dead ends: 2433 [2022-03-15 16:12:50,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:12:50,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:50,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 158 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1180 Invalid, 0 Unknown, 375 Unchecked, 0.5s Time] [2022-03-15 16:12:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-03-15 16:12:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2003. [2022-03-15 16:12:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.2472527472527473) internal successors, (6501), 2002 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6501 transitions. [2022-03-15 16:12:50,309 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6501 transitions. Word has length 24 [2022-03-15 16:12:50,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:50,309 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6501 transitions. [2022-03-15 16:12:50,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6501 transitions. [2022-03-15 16:12:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:50,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:50,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:50,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-15 16:12:50,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 16:12:50,513 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1528928674, now seen corresponding path program 17 times [2022-03-15 16:12:50,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:50,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612626226] [2022-03-15 16:12:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:50,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:50,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612626226] [2022-03-15 16:12:50,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612626226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:50,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229853120] [2022-03-15 16:12:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:12:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:50,759 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:50,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 16:12:50,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:12:50,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:50,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:50,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:51,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:51,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:51,068 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 37 treesize of output 21 [2022-03-15 16:12:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:51,355 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:51,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:12:51,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:51,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:51,413 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 20 treesize of output 3 [2022-03-15 16:12:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:51,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229853120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:51,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:51,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:51,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228676956] [2022-03-15 16:12:51,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:51,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:51,430 INFO L87 Difference]: Start difference. First operand 2003 states and 6501 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:52,683 INFO L93 Difference]: Finished difference Result 2506 states and 8053 transitions. [2022-03-15 16:12:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:12:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:52,687 INFO L225 Difference]: With dead ends: 2506 [2022-03-15 16:12:52,687 INFO L226 Difference]: Without dead ends: 2499 [2022-03-15 16:12:52,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:12:52,688 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:52,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 161 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1502 Invalid, 0 Unknown, 778 Unchecked, 0.6s Time] [2022-03-15 16:12:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-03-15 16:12:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1997. [2022-03-15 16:12:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.2600200400801604) internal successors, (6507), 1996 states have internal predecessors, (6507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6507 transitions. [2022-03-15 16:12:52,713 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6507 transitions. Word has length 24 [2022-03-15 16:12:52,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:52,713 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6507 transitions. [2022-03-15 16:12:52,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:52,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6507 transitions. [2022-03-15 16:12:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:52,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:52,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:52,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-15 16:12:52,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:52,916 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -387153423, now seen corresponding path program 3 times [2022-03-15 16:12:52,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:52,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453510669] [2022-03-15 16:12:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:53,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:53,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453510669] [2022-03-15 16:12:53,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453510669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:53,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987171932] [2022-03-15 16:12:53,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:53,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:53,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:53,149 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:53,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 16:12:53,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:12:53,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:12:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:53,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:53,652 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 29 treesize of output 17 [2022-03-15 16:12:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:53,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:54,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:54,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:54,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:12:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:54,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987171932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:54,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:54,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:12:54,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297914903] [2022-03-15 16:12:54,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:54,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:12:54,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:12:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:12:54,262 INFO L87 Difference]: Start difference. First operand 1997 states and 6507 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:56,969 INFO L93 Difference]: Finished difference Result 2682 states and 8625 transitions. [2022-03-15 16:12:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:12:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 24 [2022-03-15 16:12:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:56,974 INFO L225 Difference]: With dead ends: 2682 [2022-03-15 16:12:56,974 INFO L226 Difference]: Without dead ends: 2673 [2022-03-15 16:12:56,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=541, Invalid=5939, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:12:56,975 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:56,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 235 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1633 Invalid, 0 Unknown, 732 Unchecked, 0.7s Time] [2022-03-15 16:12:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-03-15 16:12:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2019. [2022-03-15 16:12:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.2547076313181367) internal successors, (6568), 2018 states have internal predecessors, (6568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:57,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6568 transitions. [2022-03-15 16:12:57,005 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6568 transitions. Word has length 24 [2022-03-15 16:12:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:57,005 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 6568 transitions. [2022-03-15 16:12:57,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6568 transitions. [2022-03-15 16:12:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:57,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:57,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:57,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-15 16:12:57,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:57,208 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 856297860, now seen corresponding path program 10 times [2022-03-15 16:12:57,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:57,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703115562] [2022-03-15 16:12:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:57,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:57,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703115562] [2022-03-15 16:12:57,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703115562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:57,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616290601] [2022-03-15 16:12:57,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:12:57,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:57,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:57,440 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:57,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 16:12:57,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:12:57,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:57,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:57,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:57,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:57,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-15 16:12:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:57,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:58,050 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:12:58,050 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:12:58,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:58,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:58,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:12:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:58,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616290601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:58,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:58,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:12:58,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638436662] [2022-03-15 16:12:58,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:58,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:12:58,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:12:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:12:58,124 INFO L87 Difference]: Start difference. First operand 2019 states and 6568 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:58,957 INFO L93 Difference]: Finished difference Result 2425 states and 7756 transitions. [2022-03-15 16:12:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:12:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:12:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:58,962 INFO L225 Difference]: With dead ends: 2425 [2022-03-15 16:12:58,962 INFO L226 Difference]: Without dead ends: 2420 [2022-03-15 16:12:58,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:12:58,963 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:58,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 113 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1036 Invalid, 0 Unknown, 303 Unchecked, 0.4s Time] [2022-03-15 16:12:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-03-15 16:12:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2020. [2022-03-15 16:12:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.254581475978207) internal successors, (6571), 2019 states have internal predecessors, (6571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6571 transitions. [2022-03-15 16:12:58,993 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6571 transitions. Word has length 24 [2022-03-15 16:12:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:58,993 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 6571 transitions. [2022-03-15 16:12:58,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6571 transitions. [2022-03-15 16:12:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:12:58,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:58,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:59,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-15 16:12:59,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-15 16:12:59,196 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:12:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -799013370, now seen corresponding path program 11 times [2022-03-15 16:12:59,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:59,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193870206] [2022-03-15 16:12:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:59,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:59,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:59,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193870206] [2022-03-15 16:12:59,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193870206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:59,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4953796] [2022-03-15 16:12:59,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:12:59,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:59,478 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:59,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 16:12:59,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:12:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:12:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:59,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:59,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:59,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:12:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:59,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:00,069 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:00,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:13:00,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:00,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:13:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:00,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4953796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:00,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:00,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:13:00,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053890936] [2022-03-15 16:13:00,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:00,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:13:00,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:13:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:13:00,141 INFO L87 Difference]: Start difference. First operand 2020 states and 6571 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:01,086 INFO L93 Difference]: Finished difference Result 2712 states and 8738 transitions. [2022-03-15 16:13:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:13:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:13:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:01,091 INFO L225 Difference]: With dead ends: 2712 [2022-03-15 16:13:01,091 INFO L226 Difference]: Without dead ends: 2705 [2022-03-15 16:13:01,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:13:01,092 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:01,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 214 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1170 Invalid, 0 Unknown, 558 Unchecked, 0.5s Time] [2022-03-15 16:13:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-15 16:13:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2027. [2022-03-15 16:13:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.25715695952616) internal successors, (6599), 2026 states have internal predecessors, (6599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6599 transitions. [2022-03-15 16:13:01,128 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6599 transitions. Word has length 24 [2022-03-15 16:13:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:01,128 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 6599 transitions. [2022-03-15 16:13:01,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6599 transitions. [2022-03-15 16:13:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:01,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:01,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:01,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-15 16:13:01,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:01,332 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1411944732, now seen corresponding path program 12 times [2022-03-15 16:13:01,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:01,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286641107] [2022-03-15 16:13:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:01,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:01,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286641107] [2022-03-15 16:13:01,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286641107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:01,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162108413] [2022-03-15 16:13:01,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:01,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:01,556 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:01,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 16:13:01,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:13:01,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:13:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:02,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:02,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:02,157 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-15 16:13:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:02,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:03,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:03,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:03,059 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 37 treesize of output 7 [2022-03-15 16:13:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:03,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162108413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:03,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:03,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:13:03,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100365183] [2022-03-15 16:13:03,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:03,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:13:03,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:03,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:13:03,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:13:03,103 INFO L87 Difference]: Start difference. First operand 2027 states and 6599 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:04,229 INFO L93 Difference]: Finished difference Result 2393 states and 7634 transitions. [2022-03-15 16:13:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:13:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 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 24 [2022-03-15 16:13:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:04,234 INFO L225 Difference]: With dead ends: 2393 [2022-03-15 16:13:04,234 INFO L226 Difference]: Without dead ends: 2389 [2022-03-15 16:13:04,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:13:04,234 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:04,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 169 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 0 Unknown, 924 Unchecked, 0.2s Time] [2022-03-15 16:13:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-03-15 16:13:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2070. [2022-03-15 16:13:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 3.252779120347994) internal successors, (6730), 2069 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 6730 transitions. [2022-03-15 16:13:04,270 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 6730 transitions. Word has length 24 [2022-03-15 16:13:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:04,270 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 6730 transitions. [2022-03-15 16:13:04,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 6730 transitions. [2022-03-15 16:13:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:04,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:04,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:04,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:04,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:04,487 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1021687328, now seen corresponding path program 13 times [2022-03-15 16:13:04,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:04,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084008389] [2022-03-15 16:13:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:04,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:04,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:04,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084008389] [2022-03-15 16:13:04,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084008389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:04,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875999800] [2022-03-15 16:13:04,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:04,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:04,732 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:04,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 16:13:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:04,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:04,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:05,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:05,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:05,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:05,046 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 37 treesize of output 21 [2022-03-15 16:13:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:05,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:05,324 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:05,325 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 20 treesize of output 43 [2022-03-15 16:13:05,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:05,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:05,380 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 20 treesize of output 3 [2022-03-15 16:13:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:05,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875999800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:05,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:05,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:13:05,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101165007] [2022-03-15 16:13:05,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:05,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:13:05,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:13:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:13:05,400 INFO L87 Difference]: Start difference. First operand 2070 states and 6730 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:06,202 INFO L93 Difference]: Finished difference Result 2491 states and 8001 transitions. [2022-03-15 16:13:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:13:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:13:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:06,207 INFO L225 Difference]: With dead ends: 2491 [2022-03-15 16:13:06,207 INFO L226 Difference]: Without dead ends: 2485 [2022-03-15 16:13:06,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:13:06,207 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:06,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 122 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1072 Invalid, 0 Unknown, 629 Unchecked, 0.4s Time] [2022-03-15 16:13:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-03-15 16:13:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2064. [2022-03-15 16:13:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.256907416383907) internal successors, (6719), 2063 states have internal predecessors, (6719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 6719 transitions. [2022-03-15 16:13:06,244 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 6719 transitions. Word has length 24 [2022-03-15 16:13:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:06,244 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 6719 transitions. [2022-03-15 16:13:06,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 6719 transitions. [2022-03-15 16:13:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:06,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:06,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:06,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-15 16:13:06,447 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,SelfDestructingSolverStorable175 [2022-03-15 16:13:06,447 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1722611165, now seen corresponding path program 101 times [2022-03-15 16:13:06,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:06,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516298532] [2022-03-15 16:13:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:06,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:06,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516298532] [2022-03-15 16:13:06,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516298532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:06,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204393092] [2022-03-15 16:13:06,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:06,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:06,690 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 16:13:06,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:13:06,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:06,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:06,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:06,963 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 33 treesize of output 17 [2022-03-15 16:13:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:07,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:07,295 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:07,295 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 20 treesize of output 43 [2022-03-15 16:13:07,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:07,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:07,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:13:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:07,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204393092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:07,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:07,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:13:07,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650076424] [2022-03-15 16:13:07,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:07,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:13:07,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:13:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:13:07,371 INFO L87 Difference]: Start difference. First operand 2064 states and 6719 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:08,411 INFO L93 Difference]: Finished difference Result 2348 states and 7639 transitions. [2022-03-15 16:13:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:13:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:13:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:08,415 INFO L225 Difference]: With dead ends: 2348 [2022-03-15 16:13:08,415 INFO L226 Difference]: Without dead ends: 2342 [2022-03-15 16:13:08,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:13:08,415 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 91 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:08,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 65 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1081 Invalid, 0 Unknown, 266 Unchecked, 0.5s Time] [2022-03-15 16:13:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-03-15 16:13:08,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2062. [2022-03-15 16:13:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.2581271227559436) internal successors, (6715), 2061 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6715 transitions. [2022-03-15 16:13:08,440 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6715 transitions. Word has length 24 [2022-03-15 16:13:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:08,440 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 6715 transitions. [2022-03-15 16:13:08,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6715 transitions. [2022-03-15 16:13:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:08,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:08,443 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] [2022-03-15 16:13:08,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:08,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:08,644 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:08,644 INFO L85 PathProgramCache]: Analyzing trace with hash 775404772, now seen corresponding path program 14 times [2022-03-15 16:13:08,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:08,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589020982] [2022-03-15 16:13:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:08,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:08,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589020982] [2022-03-15 16:13:08,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589020982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:08,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462660244] [2022-03-15 16:13:08,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:08,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:08,885 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 16:13:08,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:13:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:09,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:09,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:09,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:09,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:13:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:09,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:09,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:09,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:13:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:10,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462660244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:10,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:10,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:13:10,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419732874] [2022-03-15 16:13:10,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:10,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:13:10,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:13:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:13:10,055 INFO L87 Difference]: Start difference. First operand 2062 states and 6715 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:13,005 INFO L93 Difference]: Finished difference Result 3248 states and 10717 transitions. [2022-03-15 16:13:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:13:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:13:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:13,011 INFO L225 Difference]: With dead ends: 3248 [2022-03-15 16:13:13,012 INFO L226 Difference]: Without dead ends: 3235 [2022-03-15 16:13:13,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:13:13,012 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 219 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1698 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:13,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 176 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1252 Invalid, 0 Unknown, 1698 Unchecked, 0.6s Time] [2022-03-15 16:13:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-03-15 16:13:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 2107. [2022-03-15 16:13:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 3.268281101614435) internal successors, (6883), 2106 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 6883 transitions. [2022-03-15 16:13:13,045 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 6883 transitions. Word has length 24 [2022-03-15 16:13:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 6883 transitions. [2022-03-15 16:13:13,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 6883 transitions. [2022-03-15 16:13:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:13,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:13,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:13,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-15 16:13:13,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-15 16:13:13,249 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash -725136200, now seen corresponding path program 15 times [2022-03-15 16:13:13,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:13,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281485014] [2022-03-15 16:13:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:13,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:13,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281485014] [2022-03-15 16:13:13,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281485014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:13,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005063007] [2022-03-15 16:13:13,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:13,494 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:13,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 16:13:13,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:13:13,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:13:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:13,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:13,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:13:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:14,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:14,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:14,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:14,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:14,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:13:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:14,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005063007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:14,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:14,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:13:14,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035738123] [2022-03-15 16:13:14,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:14,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:13:14,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:14,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:13:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:13:14,633 INFO L87 Difference]: Start difference. First operand 2107 states and 6883 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:17,025 INFO L93 Difference]: Finished difference Result 3163 states and 10622 transitions. [2022-03-15 16:13:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:13:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 24 [2022-03-15 16:13:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:17,032 INFO L225 Difference]: With dead ends: 3163 [2022-03-15 16:13:17,032 INFO L226 Difference]: Without dead ends: 3151 [2022-03-15 16:13:17,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=435, Invalid=3471, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:13:17,033 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:17,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 86 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 949 Invalid, 0 Unknown, 1237 Unchecked, 0.4s Time] [2022-03-15 16:13:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-03-15 16:13:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2179. [2022-03-15 16:13:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 3.2823691460055096) internal successors, (7149), 2178 states have internal predecessors, (7149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 7149 transitions. [2022-03-15 16:13:17,071 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 7149 transitions. Word has length 24 [2022-03-15 16:13:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:17,071 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 7149 transitions. [2022-03-15 16:13:17,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 7149 transitions. [2022-03-15 16:13:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:17,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:17,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:17,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-15 16:13:17,274 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,SelfDestructingSolverStorable178 [2022-03-15 16:13:17,274 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1789169850, now seen corresponding path program 18 times [2022-03-15 16:13:17,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:17,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088104578] [2022-03-15 16:13:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:17,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:17,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:17,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088104578] [2022-03-15 16:13:17,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088104578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:17,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027091216] [2022-03-15 16:13:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:17,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:17,495 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:17,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 16:13:17,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:13:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:13:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:18,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:18,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:18,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-03-15 16:13:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:18,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:18,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:18,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:18,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 60 [2022-03-15 16:13:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:18,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027091216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:18,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:18,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:13:18,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761555836] [2022-03-15 16:13:18,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:18,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:13:18,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:18,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:13:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:13:18,735 INFO L87 Difference]: Start difference. First operand 2179 states and 7149 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:20,339 INFO L93 Difference]: Finished difference Result 2816 states and 8947 transitions. [2022-03-15 16:13:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:13:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 24 [2022-03-15 16:13:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:20,344 INFO L225 Difference]: With dead ends: 2816 [2022-03-15 16:13:20,344 INFO L226 Difference]: Without dead ends: 2810 [2022-03-15 16:13:20,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:13:20,344 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1681 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:20,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 216 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1547 Invalid, 0 Unknown, 1681 Unchecked, 0.6s Time] [2022-03-15 16:13:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-03-15 16:13:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2155. [2022-03-15 16:13:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.288300835654596) internal successors, (7083), 2154 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7083 transitions. [2022-03-15 16:13:20,385 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7083 transitions. Word has length 24 [2022-03-15 16:13:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:20,385 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 7083 transitions. [2022-03-15 16:13:20,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7083 transitions. [2022-03-15 16:13:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:20,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:20,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:20,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-15 16:13:20,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:20,588 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash 319872101, now seen corresponding path program 102 times [2022-03-15 16:13:20,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:20,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780500556] [2022-03-15 16:13:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:20,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:20,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:20,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780500556] [2022-03-15 16:13:20,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780500556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:20,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669776671] [2022-03-15 16:13:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:20,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:20,841 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:20,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 16:13:20,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:13:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:13:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:21,158 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:13:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:21,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:21,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:21,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:13:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:22,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669776671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:22,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:22,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:13:22,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357846704] [2022-03-15 16:13:22,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:22,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:13:22,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:13:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:13:22,062 INFO L87 Difference]: Start difference. First operand 2155 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:24,465 INFO L93 Difference]: Finished difference Result 3178 states and 10559 transitions. [2022-03-15 16:13:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:13:24,465 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:13:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:24,471 INFO L225 Difference]: With dead ends: 3178 [2022-03-15 16:13:24,471 INFO L226 Difference]: Without dead ends: 3163 [2022-03-15 16:13:24,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=391, Invalid=3031, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:13:24,472 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1328 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 233 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1195 Invalid, 0 Unknown, 1328 Unchecked, 0.6s Time] [2022-03-15 16:13:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-03-15 16:13:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2173. [2022-03-15 16:13:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.2905156537753224) internal successors, (7147), 2172 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7147 transitions. [2022-03-15 16:13:24,501 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7147 transitions. Word has length 24 [2022-03-15 16:13:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:24,501 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7147 transitions. [2022-03-15 16:13:24,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7147 transitions. [2022-03-15 16:13:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:24,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:24,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:24,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-15 16:13:24,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:24,705 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 448954820, now seen corresponding path program 16 times [2022-03-15 16:13:24,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:24,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233502892] [2022-03-15 16:13:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:25,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:25,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233502892] [2022-03-15 16:13:25,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233502892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:25,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598322987] [2022-03-15 16:13:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:25,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:25,023 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:25,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 16:13:25,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:25,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:25,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:25,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:25,317 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 17 [2022-03-15 16:13:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:25,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:25,649 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:25,650 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 20 treesize of output 43 [2022-03-15 16:13:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:25,705 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 20 treesize of output 3 [2022-03-15 16:13:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:25,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598322987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:25,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:25,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:13:25,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55926250] [2022-03-15 16:13:25,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:25,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:13:25,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:13:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:13:25,723 INFO L87 Difference]: Start difference. First operand 2173 states and 7147 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:26,928 INFO L93 Difference]: Finished difference Result 2465 states and 8079 transitions. [2022-03-15 16:13:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:13:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:13:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:26,932 INFO L225 Difference]: With dead ends: 2465 [2022-03-15 16:13:26,933 INFO L226 Difference]: Without dead ends: 2458 [2022-03-15 16:13:26,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:13:26,933 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 99 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:26,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 83 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1349 Invalid, 0 Unknown, 193 Unchecked, 0.6s Time] [2022-03-15 16:13:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-03-15 16:13:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2167. [2022-03-15 16:13:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.2899353647276084) internal successors, (7126), 2166 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7126 transitions. [2022-03-15 16:13:26,960 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7126 transitions. Word has length 24 [2022-03-15 16:13:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:26,960 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 7126 transitions. [2022-03-15 16:13:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7126 transitions. [2022-03-15 16:13:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:26,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:26,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:26,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 16:13:27,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:27,164 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1299422423, now seen corresponding path program 103 times [2022-03-15 16:13:27,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:27,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564347447] [2022-03-15 16:13:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:27,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:27,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:27,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564347447] [2022-03-15 16:13:27,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564347447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:27,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49179819] [2022-03-15 16:13:27,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:27,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:27,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:27,421 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:27,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 16:13:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:27,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:27,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:27,697 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 17 [2022-03-15 16:13:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:27,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:28,045 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:28,046 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 20 treesize of output 43 [2022-03-15 16:13:28,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:13:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:28,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49179819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:28,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:28,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:13:28,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476825138] [2022-03-15 16:13:28,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:13:28,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:13:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:13:28,134 INFO L87 Difference]: Start difference. First operand 2167 states and 7126 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:29,382 INFO L93 Difference]: Finished difference Result 2554 states and 8369 transitions. [2022-03-15 16:13:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:13:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:13:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:29,387 INFO L225 Difference]: With dead ends: 2554 [2022-03-15 16:13:29,387 INFO L226 Difference]: Without dead ends: 2544 [2022-03-15 16:13:29,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:13:29,387 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 708 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:29,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 69 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1284 Invalid, 0 Unknown, 708 Unchecked, 0.6s Time] [2022-03-15 16:13:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-03-15 16:13:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2169. [2022-03-15 16:13:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.2896678966789668) internal successors, (7132), 2168 states have internal predecessors, (7132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7132 transitions. [2022-03-15 16:13:29,415 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7132 transitions. Word has length 24 [2022-03-15 16:13:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:29,416 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 7132 transitions. [2022-03-15 16:13:29,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7132 transitions. [2022-03-15 16:13:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:29,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:29,418 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] [2022-03-15 16:13:29,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-15 16:13:29,619 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,SelfDestructingSolverStorable182 [2022-03-15 16:13:29,619 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash -999955525, now seen corresponding path program 104 times [2022-03-15 16:13:29,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:29,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638663084] [2022-03-15 16:13:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:29,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:29,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638663084] [2022-03-15 16:13:29,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638663084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:29,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613589085] [2022-03-15 16:13:29,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:29,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:29,879 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:29,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 16:13:29,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:29,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:13:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:30,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:30,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:30,187 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:13:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:30,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:30,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:30,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:30,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:13:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:31,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613589085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:31,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:31,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:13:31,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795769311] [2022-03-15 16:13:31,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:31,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:13:31,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:13:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:13:31,133 INFO L87 Difference]: Start difference. First operand 2169 states and 7132 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:35,562 INFO L93 Difference]: Finished difference Result 3653 states and 12342 transitions. [2022-03-15 16:13:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:13:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:13:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:35,569 INFO L225 Difference]: With dead ends: 3653 [2022-03-15 16:13:35,569 INFO L226 Difference]: Without dead ends: 3646 [2022-03-15 16:13:35,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=660, Invalid=5346, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:13:35,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:35,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 189 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1088 Invalid, 0 Unknown, 1365 Unchecked, 0.5s Time] [2022-03-15 16:13:35,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-03-15 16:13:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 2188. [2022-03-15 16:13:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 3.3017832647462275) internal successors, (7221), 2187 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 7221 transitions. [2022-03-15 16:13:35,618 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 7221 transitions. Word has length 24 [2022-03-15 16:13:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:35,618 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 7221 transitions. [2022-03-15 16:13:35,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 7221 transitions. [2022-03-15 16:13:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:35,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:35,621 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] [2022-03-15 16:13:35,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 16:13:35,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:35,821 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash 925650051, now seen corresponding path program 105 times [2022-03-15 16:13:35,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:35,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202858019] [2022-03-15 16:13:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:36,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:36,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202858019] [2022-03-15 16:13:36,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202858019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:36,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561085742] [2022-03-15 16:13:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:36,067 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:36,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 16:13:36,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:13:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:13:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:36,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:36,403 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 21 [2022-03-15 16:13:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:36,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:36,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:36,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:36,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:13:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:36,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561085742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:36,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:36,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:13:36,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557212031] [2022-03-15 16:13:36,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:36,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:13:36,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:13:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:13:36,921 INFO L87 Difference]: Start difference. First operand 2188 states and 7221 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:38,852 INFO L93 Difference]: Finished difference Result 2585 states and 8416 transitions. [2022-03-15 16:13:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:13:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 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 24 [2022-03-15 16:13:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:38,857 INFO L225 Difference]: With dead ends: 2585 [2022-03-15 16:13:38,857 INFO L226 Difference]: Without dead ends: 2579 [2022-03-15 16:13:38,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=383, Invalid=3399, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:13:38,857 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:38,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 121 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1336 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2022-03-15 16:13:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2022-03-15 16:13:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2194. [2022-03-15 16:13:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 3.3046055631554947) internal successors, (7247), 2193 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7247 transitions. [2022-03-15 16:13:38,891 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7247 transitions. Word has length 24 [2022-03-15 16:13:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 7247 transitions. [2022-03-15 16:13:38,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7247 transitions. [2022-03-15 16:13:38,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:38,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:38,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:38,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:39,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:39,095 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2054445773, now seen corresponding path program 106 times [2022-03-15 16:13:39,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:39,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507837357] [2022-03-15 16:13:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:39,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:39,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507837357] [2022-03-15 16:13:39,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507837357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:39,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180708376] [2022-03-15 16:13:39,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:39,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:39,324 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:39,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 16:13:39,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:39,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:39,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:39,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,650 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 37 treesize of output 21 [2022-03-15 16:13:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:39,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:39,960 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:39,960 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 20 treesize of output 43 [2022-03-15 16:13:40,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:40,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:40,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:40,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:40,005 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 20 treesize of output 3 [2022-03-15 16:13:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:40,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180708376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:40,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:40,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:13:40,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505221383] [2022-03-15 16:13:40,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:13:40,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:13:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:13:40,023 INFO L87 Difference]: Start difference. First operand 2194 states and 7247 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:41,300 INFO L93 Difference]: Finished difference Result 2561 states and 8346 transitions. [2022-03-15 16:13:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:13:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:13:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:41,305 INFO L225 Difference]: With dead ends: 2561 [2022-03-15 16:13:41,305 INFO L226 Difference]: Without dead ends: 2554 [2022-03-15 16:13:41,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:13:41,306 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 132 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:41,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 157 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1740 Invalid, 0 Unknown, 225 Unchecked, 0.7s Time] [2022-03-15 16:13:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-03-15 16:13:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2200. [2022-03-15 16:13:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.3024101864483857) internal successors, (7262), 2199 states have internal predecessors, (7262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-03-15 16:13:41,335 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-03-15 16:13:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:41,335 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-03-15 16:13:41,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-03-15 16:13:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:41,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:41,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:41,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-15 16:13:41,538 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,SelfDestructingSolverStorable185 [2022-03-15 16:13:41,539 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash 976075949, now seen corresponding path program 107 times [2022-03-15 16:13:41,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:41,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071900865] [2022-03-15 16:13:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:41,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:41,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071900865] [2022-03-15 16:13:41,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071900865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:41,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280170493] [2022-03-15 16:13:41,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:41,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:41,785 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:41,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 16:13:41,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:13:41,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:42,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:42,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:42,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-15 16:13:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:42,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:42,415 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:42,416 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 20 treesize of output 43 [2022-03-15 16:13:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:42,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:42,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:42,467 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 20 treesize of output 3 [2022-03-15 16:13:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:42,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280170493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:42,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:42,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:13:42,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189552232] [2022-03-15 16:13:42,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:42,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:13:42,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:13:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:13:42,485 INFO L87 Difference]: Start difference. First operand 2200 states and 7262 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:43,809 INFO L93 Difference]: Finished difference Result 2566 states and 8345 transitions. [2022-03-15 16:13:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:13:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:13:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:43,814 INFO L225 Difference]: With dead ends: 2566 [2022-03-15 16:13:43,814 INFO L226 Difference]: Without dead ends: 2564 [2022-03-15 16:13:43,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:13:43,815 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:43,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 159 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1745 Invalid, 0 Unknown, 331 Unchecked, 0.7s Time] [2022-03-15 16:13:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-03-15 16:13:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2200. [2022-03-15 16:13:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.3024101864483857) internal successors, (7262), 2199 states have internal predecessors, (7262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-03-15 16:13:43,848 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-03-15 16:13:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:43,848 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-03-15 16:13:43,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-03-15 16:13:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:43,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:43,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:43,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-15 16:13:44,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:44,051 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash -679235281, now seen corresponding path program 108 times [2022-03-15 16:13:44,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:44,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594366490] [2022-03-15 16:13:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:44,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:44,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594366490] [2022-03-15 16:13:44,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594366490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:44,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102649063] [2022-03-15 16:13:44,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:44,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:44,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:44,268 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:44,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 16:13:44,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:13:44,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:13:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:44,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:44,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-15 16:13:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:45,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:45,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:45,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:45,450 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 37 treesize of output 7 [2022-03-15 16:13:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:45,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102649063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:45,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:45,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:13:45,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182461524] [2022-03-15 16:13:45,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:45,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:13:45,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:13:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:13:45,493 INFO L87 Difference]: Start difference. First operand 2200 states and 7262 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:49,599 INFO L93 Difference]: Finished difference Result 3532 states and 11623 transitions. [2022-03-15 16:13:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 16:13:49,599 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 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 24 [2022-03-15 16:13:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:49,605 INFO L225 Difference]: With dead ends: 3532 [2022-03-15 16:13:49,606 INFO L226 Difference]: Without dead ends: 3521 [2022-03-15 16:13:49,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3901 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1258, Invalid=10298, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 16:13:49,606 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 442 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1069 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:49,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 175 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1711 Invalid, 0 Unknown, 1069 Unchecked, 0.8s Time] [2022-03-15 16:13:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-03-15 16:13:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2256. [2022-03-15 16:13:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.2829268292682925) internal successors, (7403), 2255 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7403 transitions. [2022-03-15 16:13:49,642 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7403 transitions. Word has length 24 [2022-03-15 16:13:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:49,642 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 7403 transitions. [2022-03-15 16:13:49,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7403 transitions. [2022-03-15 16:13:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:49,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:49,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:49,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-15 16:13:49,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:49,845 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:49,846 INFO L85 PathProgramCache]: Analyzing trace with hash 443570164, now seen corresponding path program 19 times [2022-03-15 16:13:49,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:49,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718651075] [2022-03-15 16:13:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:49,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:50,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:50,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718651075] [2022-03-15 16:13:50,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718651075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:50,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082777279] [2022-03-15 16:13:50,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:50,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:50,070 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:50,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 16:13:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:50,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:50,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,395 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 17 [2022-03-15 16:13:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:50,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:50,716 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:50,717 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 20 treesize of output 43 [2022-03-15 16:13:50,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,770 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:13:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:50,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082777279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:50,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:50,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:13:50,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636443011] [2022-03-15 16:13:50,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:50,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:13:50,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:13:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:13:50,789 INFO L87 Difference]: Start difference. First operand 2256 states and 7403 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:51,901 INFO L93 Difference]: Finished difference Result 2774 states and 8963 transitions. [2022-03-15 16:13:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:13:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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 24 [2022-03-15 16:13:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:51,906 INFO L225 Difference]: With dead ends: 2774 [2022-03-15 16:13:51,906 INFO L226 Difference]: Without dead ends: 2767 [2022-03-15 16:13:51,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:13:51,907 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:51,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 156 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1613 Invalid, 0 Unknown, 844 Unchecked, 0.6s Time] [2022-03-15 16:13:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-03-15 16:13:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2254. [2022-03-15 16:13:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 3.28450954283178) internal successors, (7400), 2253 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 7400 transitions. [2022-03-15 16:13:51,939 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 7400 transitions. Word has length 24 [2022-03-15 16:13:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:51,939 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 7400 transitions. [2022-03-15 16:13:51,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 7400 transitions. [2022-03-15 16:13:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:51,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:51,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:51,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-15 16:13:52,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:52,142 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991413, now seen corresponding path program 109 times [2022-03-15 16:13:52,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:52,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039645911] [2022-03-15 16:13:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:52,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:52,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039645911] [2022-03-15 16:13:52,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039645911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:52,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146987351] [2022-03-15 16:13:52,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:52,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:52,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:52,398 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:52,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 16:13:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:52,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:52,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:52,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:52,702 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 17 [2022-03-15 16:13:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:52,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:52,990 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:13:52,991 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 20 treesize of output 43 [2022-03-15 16:13:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:53,034 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 20 treesize of output 3 [2022-03-15 16:13:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:53,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146987351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:53,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:53,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:13:53,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772951344] [2022-03-15 16:13:53,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:53,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:13:53,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:13:53,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:13:53,052 INFO L87 Difference]: Start difference. First operand 2254 states and 7400 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:53,871 INFO L93 Difference]: Finished difference Result 2643 states and 8605 transitions. [2022-03-15 16:13:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:13:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:13:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:53,876 INFO L225 Difference]: With dead ends: 2643 [2022-03-15 16:13:53,876 INFO L226 Difference]: Without dead ends: 2637 [2022-03-15 16:13:53,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:13:53,877 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1088 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:53,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 133 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1156 Invalid, 0 Unknown, 1088 Unchecked, 0.5s Time] [2022-03-15 16:13:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-03-15 16:13:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2232. [2022-03-15 16:13:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 3.2909009412819366) internal successors, (7342), 2231 states have internal predecessors, (7342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7342 transitions. [2022-03-15 16:13:53,908 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7342 transitions. Word has length 24 [2022-03-15 16:13:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:53,908 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 7342 transitions. [2022-03-15 16:13:53,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7342 transitions. [2022-03-15 16:13:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:53,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:53,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:53,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:54,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 16:13:54,111 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash -22424909, now seen corresponding path program 110 times [2022-03-15 16:13:54,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:54,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012004614] [2022-03-15 16:13:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:54,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:54,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012004614] [2022-03-15 16:13:54,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012004614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:54,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690101842] [2022-03-15 16:13:54,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:54,363 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:54,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 16:13:54,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:54,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:54,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:54,724 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 39 treesize of output 51 [2022-03-15 16:13:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:54,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:55,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:55,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:55,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:55,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:55,271 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 45 treesize of output 50 [2022-03-15 16:13:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:55,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690101842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:55,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:55,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-03-15 16:13:55,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817208322] [2022-03-15 16:13:55,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:55,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:13:55,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:13:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:13:55,363 INFO L87 Difference]: Start difference. First operand 2232 states and 7342 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:56,183 INFO L93 Difference]: Finished difference Result 2702 states and 8810 transitions. [2022-03-15 16:13:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:13:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 24 [2022-03-15 16:13:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:56,189 INFO L225 Difference]: With dead ends: 2702 [2022-03-15 16:13:56,189 INFO L226 Difference]: Without dead ends: 2690 [2022-03-15 16:13:56,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:13:56,189 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:56,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 124 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 851 Invalid, 0 Unknown, 572 Unchecked, 0.4s Time] [2022-03-15 16:13:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-03-15 16:13:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2249. [2022-03-15 16:13:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 3.2895907473309607) internal successors, (7395), 2248 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7395 transitions. [2022-03-15 16:13:56,234 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7395 transitions. Word has length 24 [2022-03-15 16:13:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:56,234 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7395 transitions. [2022-03-15 16:13:56,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7395 transitions. [2022-03-15 16:13:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:13:56,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:56,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:56,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:56,439 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,SelfDestructingSolverStorable190 [2022-03-15 16:13:56,439 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:13:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1339655707, now seen corresponding path program 111 times [2022-03-15 16:13:56,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:56,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202331645] [2022-03-15 16:13:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:56,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:56,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:56,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202331645] [2022-03-15 16:13:56,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202331645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:56,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900814371] [2022-03-15 16:13:56,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:56,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:56,769 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:56,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 16:13:56,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:13:56,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:13:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:57,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:57,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:13:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:57,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:57,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,934 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 45 treesize of output 7 [2022-03-15 16:13:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:57,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900814371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:57,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:57,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:13:57,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870366240] [2022-03-15 16:13:57,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:13:57,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:13:57,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:13:57,966 INFO L87 Difference]: Start difference. First operand 2249 states and 7395 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:02,252 INFO L93 Difference]: Finished difference Result 3092 states and 9920 transitions. [2022-03-15 16:14:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:14:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:14:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:02,258 INFO L225 Difference]: With dead ends: 3092 [2022-03-15 16:14:02,258 INFO L226 Difference]: Without dead ends: 3072 [2022-03-15 16:14:02,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=735, Invalid=6575, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:14:02,258 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 327 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:02,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 186 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2427 Invalid, 0 Unknown, 924 Unchecked, 1.2s Time] [2022-03-15 16:14:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-03-15 16:14:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2263. [2022-03-15 16:14:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2939876215738284) internal successors, (7451), 2262 states have internal predecessors, (7451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7451 transitions. [2022-03-15 16:14:02,289 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7451 transitions. Word has length 24 [2022-03-15 16:14:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:02,289 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7451 transitions. [2022-03-15 16:14:02,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7451 transitions. [2022-03-15 16:14:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:02,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:02,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:02,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-15 16:14:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:02,493 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -299419909, now seen corresponding path program 112 times [2022-03-15 16:14:02,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:02,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309221450] [2022-03-15 16:14:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:02,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:02,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309221450] [2022-03-15 16:14:02,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309221450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:02,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108935170] [2022-03-15 16:14:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:02,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:02,781 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:02,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 16:14:02,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:02,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:02,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:03,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:03,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:03,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:03,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:03,015 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 34 treesize of output 20 [2022-03-15 16:14:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:03,336 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:03,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:14:03,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:03,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:03,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:03,382 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 20 treesize of output 3 [2022-03-15 16:14:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:03,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108935170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:03,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:03,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:03,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124699047] [2022-03-15 16:14:03,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:03,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:03,401 INFO L87 Difference]: Start difference. First operand 2263 states and 7451 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:04,464 INFO L93 Difference]: Finished difference Result 2531 states and 8331 transitions. [2022-03-15 16:14:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:14:04,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:14:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:04,470 INFO L225 Difference]: With dead ends: 2531 [2022-03-15 16:14:04,470 INFO L226 Difference]: Without dead ends: 2524 [2022-03-15 16:14:04,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:14:04,470 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:04,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 103 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1538 Invalid, 0 Unknown, 480 Unchecked, 0.6s Time] [2022-03-15 16:14:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2022-03-15 16:14:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2265. [2022-03-15 16:14:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.2928445229681977) internal successors, (7455), 2264 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7455 transitions. [2022-03-15 16:14:04,510 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7455 transitions. Word has length 24 [2022-03-15 16:14:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 7455 transitions. [2022-03-15 16:14:04,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7455 transitions. [2022-03-15 16:14:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:04,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:04,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:04,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-15 16:14:04,713 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,SelfDestructingSolverStorable192 [2022-03-15 16:14:04,714 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1133158349, now seen corresponding path program 113 times [2022-03-15 16:14:04,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:04,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844740961] [2022-03-15 16:14:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:04,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:05,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:05,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844740961] [2022-03-15 16:14:05,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844740961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:05,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762419402] [2022-03-15 16:14:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:05,019 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:05,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 16:14:05,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:14:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:05,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:05,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:05,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:05,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:05,297 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-03-15 16:14:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:06,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:06,168 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 37 treesize of output 7 [2022-03-15 16:14:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:06,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762419402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:06,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:06,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:14:06,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957295741] [2022-03-15 16:14:06,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:14:06,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:14:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:14:06,212 INFO L87 Difference]: Start difference. First operand 2265 states and 7455 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:07,269 INFO L93 Difference]: Finished difference Result 2355 states and 7699 transitions. [2022-03-15 16:14:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:14:07,269 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 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 24 [2022-03-15 16:14:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:07,274 INFO L225 Difference]: With dead ends: 2355 [2022-03-15 16:14:07,274 INFO L226 Difference]: Without dead ends: 2353 [2022-03-15 16:14:07,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:14:07,274 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:07,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 123 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 821 Invalid, 0 Unknown, 494 Unchecked, 0.3s Time] [2022-03-15 16:14:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-03-15 16:14:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2274. [2022-03-15 16:14:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2273 states have (on average 3.291684997800264) internal successors, (7482), 2273 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 7482 transitions. [2022-03-15 16:14:07,313 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 7482 transitions. Word has length 24 [2022-03-15 16:14:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:07,313 INFO L470 AbstractCegarLoop]: Abstraction has 2274 states and 7482 transitions. [2022-03-15 16:14:07,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 7482 transitions. [2022-03-15 16:14:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:07,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:07,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:07,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-15 16:14:07,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:07,517 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1149245489, now seen corresponding path program 114 times [2022-03-15 16:14:07,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:07,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749449521] [2022-03-15 16:14:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:07,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:07,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749449521] [2022-03-15 16:14:07,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749449521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:07,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422331868] [2022-03-15 16:14:07,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:07,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:07,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:07,781 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:07,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 16:14:07,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:14:07,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:07,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:08,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:08,056 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:14:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:08,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:08,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:08,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:08,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:14:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:08,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422331868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:08,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:08,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:14:08,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766198298] [2022-03-15 16:14:08,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:08,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:14:08,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:14:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:14:08,824 INFO L87 Difference]: Start difference. First operand 2274 states and 7482 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:10,350 INFO L93 Difference]: Finished difference Result 2560 states and 8385 transitions. [2022-03-15 16:14:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:14:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 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 24 [2022-03-15 16:14:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:10,355 INFO L225 Difference]: With dead ends: 2560 [2022-03-15 16:14:10,355 INFO L226 Difference]: Without dead ends: 2551 [2022-03-15 16:14:10,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:10,356 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:10,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 114 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1856 Invalid, 0 Unknown, 389 Unchecked, 0.8s Time] [2022-03-15 16:14:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2022-03-15 16:14:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2279. [2022-03-15 16:14:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 3.2888498683055314) internal successors, (7492), 2278 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 7492 transitions. [2022-03-15 16:14:10,395 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 7492 transitions. Word has length 24 [2022-03-15 16:14:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:10,396 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 7492 transitions. [2022-03-15 16:14:10,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 7492 transitions. [2022-03-15 16:14:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:10,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:10,399 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] [2022-03-15 16:14:10,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-15 16:14:10,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:10,600 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -97756617, now seen corresponding path program 115 times [2022-03-15 16:14:10,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:10,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563402111] [2022-03-15 16:14:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:10,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:10,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563402111] [2022-03-15 16:14:10,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563402111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:10,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598008878] [2022-03-15 16:14:10,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:14:10,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:10,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:10,886 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:10,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 16:14:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:10,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,160 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 37 treesize of output 21 [2022-03-15 16:14:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:11,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:11,489 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:11,489 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 20 treesize of output 43 [2022-03-15 16:14:11,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,545 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 20 treesize of output 3 [2022-03-15 16:14:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:11,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598008878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:11,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:11,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:11,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413261140] [2022-03-15 16:14:11,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:11,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:11,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:11,562 INFO L87 Difference]: Start difference. First operand 2279 states and 7492 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:12,760 INFO L93 Difference]: Finished difference Result 2643 states and 8668 transitions. [2022-03-15 16:14:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:14:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:14:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:12,765 INFO L225 Difference]: With dead ends: 2643 [2022-03-15 16:14:12,765 INFO L226 Difference]: Without dead ends: 2639 [2022-03-15 16:14:12,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:14:12,765 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 203 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1410 Invalid, 0 Unknown, 884 Unchecked, 0.6s Time] [2022-03-15 16:14:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-03-15 16:14:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2298. [2022-03-15 16:14:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 3.286460600783631) internal successors, (7549), 2297 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 7549 transitions. [2022-03-15 16:14:12,793 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 7549 transitions. Word has length 24 [2022-03-15 16:14:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:12,793 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 7549 transitions. [2022-03-15 16:14:12,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 7549 transitions. [2022-03-15 16:14:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:12,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:12,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:12,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-15 16:14:12,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:12,996 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash 789747064, now seen corresponding path program 20 times [2022-03-15 16:14:12,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:12,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684268057] [2022-03-15 16:14:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:12,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:13,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:13,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684268057] [2022-03-15 16:14:13,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684268057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:13,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875191920] [2022-03-15 16:14:13,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:13,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:13,288 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:13,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 16:14:13,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:13,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:13,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:13,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:13,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:13,621 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2022-03-15 16:14:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:13,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:14,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:14,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:14:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:14,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875191920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:14,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:14,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:14:14,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311047041] [2022-03-15 16:14:14,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:14,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:14:14,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:14:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:14:14,379 INFO L87 Difference]: Start difference. First operand 2298 states and 7549 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:16,031 INFO L93 Difference]: Finished difference Result 2580 states and 8443 transitions. [2022-03-15 16:14:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:14:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 24 [2022-03-15 16:14:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:16,036 INFO L225 Difference]: With dead ends: 2580 [2022-03-15 16:14:16,036 INFO L226 Difference]: Without dead ends: 2572 [2022-03-15 16:14:16,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:14:16,036 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:16,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 129 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1795 Invalid, 0 Unknown, 529 Unchecked, 0.8s Time] [2022-03-15 16:14:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-03-15 16:14:16,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2299. [2022-03-15 16:14:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.286771105308964) internal successors, (7553), 2298 states have internal predecessors, (7553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7553 transitions. [2022-03-15 16:14:16,065 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7553 transitions. Word has length 24 [2022-03-15 16:14:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:16,065 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 7553 transitions. [2022-03-15 16:14:16,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7553 transitions. [2022-03-15 16:14:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:16,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:16,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:16,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-15 16:14:16,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:16,269 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -836912765, now seen corresponding path program 116 times [2022-03-15 16:14:16,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:16,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496386757] [2022-03-15 16:14:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:16,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:16,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496386757] [2022-03-15 16:14:16,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496386757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:16,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712421959] [2022-03-15 16:14:16,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:16,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:16,548 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:16,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 16:14:16,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:16,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:16,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:16,829 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:14:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:17,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:17,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:17,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:17,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:14:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:17,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712421959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:17,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:17,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:14:17,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505572060] [2022-03-15 16:14:17,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:17,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:14:17,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:14:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:14:17,546 INFO L87 Difference]: Start difference. First operand 2299 states and 7553 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:18,873 INFO L93 Difference]: Finished difference Result 2549 states and 8360 transitions. [2022-03-15 16:14:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:14:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:14:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:18,879 INFO L225 Difference]: With dead ends: 2549 [2022-03-15 16:14:18,879 INFO L226 Difference]: Without dead ends: 2542 [2022-03-15 16:14:18,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=1752, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:14:18,880 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:18,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 125 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1764 Invalid, 0 Unknown, 418 Unchecked, 0.7s Time] [2022-03-15 16:14:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-03-15 16:14:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2302. [2022-03-15 16:14:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.2859626249456757) internal successors, (7561), 2301 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 7561 transitions. [2022-03-15 16:14:18,912 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 7561 transitions. Word has length 24 [2022-03-15 16:14:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:18,912 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 7561 transitions. [2022-03-15 16:14:18,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 7561 transitions. [2022-03-15 16:14:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:18,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:18,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:18,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-15 16:14:19,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:19,116 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1670651205, now seen corresponding path program 117 times [2022-03-15 16:14:19,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:19,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720537038] [2022-03-15 16:14:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:19,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:19,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720537038] [2022-03-15 16:14:19,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720537038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:19,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542962736] [2022-03-15 16:14:19,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:14:19,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:19,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:19,415 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:19,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 16:14:19,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:14:19,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:14:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:19,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:19,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 56 [2022-03-15 16:14:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:21,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:21,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:21,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:21,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 61 [2022-03-15 16:14:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:21,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542962736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:21,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:21,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-15 16:14:21,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14350124] [2022-03-15 16:14:21,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:21,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:14:21,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:14:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:14:21,198 INFO L87 Difference]: Start difference. First operand 2302 states and 7561 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:24,265 INFO L93 Difference]: Finished difference Result 2576 states and 8306 transitions. [2022-03-15 16:14:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:14:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 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 24 [2022-03-15 16:14:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:24,270 INFO L225 Difference]: With dead ends: 2576 [2022-03-15 16:14:24,270 INFO L226 Difference]: Without dead ends: 2537 [2022-03-15 16:14:24,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=387, Invalid=4169, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:14:24,271 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 161 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 968 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:24,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 168 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2192 Invalid, 0 Unknown, 968 Unchecked, 1.0s Time] [2022-03-15 16:14:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-15 16:14:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2314. [2022-03-15 16:14:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.283614353653264) internal successors, (7595), 2313 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7595 transitions. [2022-03-15 16:14:24,299 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7595 transitions. Word has length 24 [2022-03-15 16:14:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:24,299 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 7595 transitions. [2022-03-15 16:14:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7595 transitions. [2022-03-15 16:14:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:24,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:24,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:24,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-15 16:14:24,502 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,SelfDestructingSolverStorable198 [2022-03-15 16:14:24,503 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:24,503 INFO L85 PathProgramCache]: Analyzing trace with hash -335916765, now seen corresponding path program 118 times [2022-03-15 16:14:24,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:24,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204402718] [2022-03-15 16:14:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:24,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:24,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:24,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204402718] [2022-03-15 16:14:24,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204402718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:24,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333381577] [2022-03-15 16:14:24,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:24,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:24,744 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:24,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 16:14:24,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:24,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:24,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:24,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:24,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:24,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:24,994 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 17 [2022-03-15 16:14:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:25,323 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:25,323 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 20 treesize of output 43 [2022-03-15 16:14:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:25,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:25,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:14:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:25,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333381577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:25,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:25,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:25,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211854602] [2022-03-15 16:14:25,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:25,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:25,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:25,393 INFO L87 Difference]: Start difference. First operand 2314 states and 7595 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:26,834 INFO L93 Difference]: Finished difference Result 2761 states and 9036 transitions. [2022-03-15 16:14:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:14:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:14:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:26,841 INFO L225 Difference]: With dead ends: 2761 [2022-03-15 16:14:26,841 INFO L226 Difference]: Without dead ends: 2743 [2022-03-15 16:14:26,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:14:26,841 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 789 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 98 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1605 Invalid, 0 Unknown, 789 Unchecked, 0.7s Time] [2022-03-15 16:14:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-03-15 16:14:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2344. [2022-03-15 16:14:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.2979086641058473) internal successors, (7727), 2343 states have internal predecessors, (7727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7727 transitions. [2022-03-15 16:14:26,886 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7727 transitions. Word has length 24 [2022-03-15 16:14:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:26,886 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7727 transitions. [2022-03-15 16:14:26,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7727 transitions. [2022-03-15 16:14:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:26,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:26,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:26,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:27,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 16:14:27,105 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1370690325, now seen corresponding path program 119 times [2022-03-15 16:14:27,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:27,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976967312] [2022-03-15 16:14:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:27,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:27,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:27,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976967312] [2022-03-15 16:14:27,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976967312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:27,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115350682] [2022-03-15 16:14:27,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:27,410 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:27,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 16:14:27,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:14:27,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:27,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:27,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:27,683 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:14:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:28,014 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:28,014 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 20 treesize of output 43 [2022-03-15 16:14:28,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:28,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:28,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:28,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:28,066 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 20 treesize of output 3 [2022-03-15 16:14:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:28,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115350682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:28,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:28,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:28,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700733247] [2022-03-15 16:14:28,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:28,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:28,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:28,084 INFO L87 Difference]: Start difference. First operand 2344 states and 7727 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:29,702 INFO L93 Difference]: Finished difference Result 2736 states and 8917 transitions. [2022-03-15 16:14:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:14:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:14:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:29,707 INFO L225 Difference]: With dead ends: 2736 [2022-03-15 16:14:29,707 INFO L226 Difference]: Without dead ends: 2717 [2022-03-15 16:14:29,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:14:29,707 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:29,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 122 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1614 Invalid, 0 Unknown, 798 Unchecked, 0.7s Time] [2022-03-15 16:14:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-03-15 16:14:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2356. [2022-03-15 16:14:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.3002123142250532) internal successors, (7772), 2355 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7772 transitions. [2022-03-15 16:14:29,741 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7772 transitions. Word has length 24 [2022-03-15 16:14:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:29,741 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 7772 transitions. [2022-03-15 16:14:29,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7772 transitions. [2022-03-15 16:14:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:29,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:29,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:29,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:29,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 16:14:29,945 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:29,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2109846473, now seen corresponding path program 120 times [2022-03-15 16:14:29,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:29,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108989744] [2022-03-15 16:14:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:30,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:30,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108989744] [2022-03-15 16:14:30,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108989744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:30,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100030865] [2022-03-15 16:14:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:30,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:30,257 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:30,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 16:14:30,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:14:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:30,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:30,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:30,543 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:14:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:30,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:31,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:31,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:31,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:14:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:31,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100030865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:31,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:31,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:14:31,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458634161] [2022-03-15 16:14:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:14:31,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:14:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:14:31,253 INFO L87 Difference]: Start difference. First operand 2356 states and 7772 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:32,563 INFO L93 Difference]: Finished difference Result 2620 states and 8615 transitions. [2022-03-15 16:14:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:14:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:14:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:32,568 INFO L225 Difference]: With dead ends: 2620 [2022-03-15 16:14:32,568 INFO L226 Difference]: Without dead ends: 2613 [2022-03-15 16:14:32,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:14:32,569 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:32,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 109 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1530 Invalid, 0 Unknown, 212 Unchecked, 0.7s Time] [2022-03-15 16:14:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-03-15 16:14:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2357. [2022-03-15 16:14:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.299660441426146) internal successors, (7774), 2356 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7774 transitions. [2022-03-15 16:14:32,600 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7774 transitions. Word has length 24 [2022-03-15 16:14:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:32,601 INFO L470 AbstractCegarLoop]: Abstraction has 2357 states and 7774 transitions. [2022-03-15 16:14:32,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7774 transitions. [2022-03-15 16:14:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:32,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:32,604 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] [2022-03-15 16:14:32,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:32,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 16:14:32,804 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1351382383, now seen corresponding path program 121 times [2022-03-15 16:14:32,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:32,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694593988] [2022-03-15 16:14:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:33,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:33,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694593988] [2022-03-15 16:14:33,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694593988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:33,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791079274] [2022-03-15 16:14:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:14:33,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:33,087 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:33,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 16:14:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:33,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:33,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:33,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:33,330 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 34 treesize of output 20 [2022-03-15 16:14:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:33,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:33,668 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:33,668 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 20 treesize of output 43 [2022-03-15 16:14:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:33,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:33,725 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 20 treesize of output 3 [2022-03-15 16:14:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:33,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791079274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:33,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:33,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:33,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952775562] [2022-03-15 16:14:33,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:33,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:33,742 INFO L87 Difference]: Start difference. First operand 2357 states and 7774 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:35,001 INFO L93 Difference]: Finished difference Result 2680 states and 8841 transitions. [2022-03-15 16:14:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:14:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:14:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:35,006 INFO L225 Difference]: With dead ends: 2680 [2022-03-15 16:14:35,006 INFO L226 Difference]: Without dead ends: 2665 [2022-03-15 16:14:35,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:14:35,007 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:35,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 89 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1496 Invalid, 0 Unknown, 250 Unchecked, 0.6s Time] [2022-03-15 16:14:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-03-15 16:14:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2367. [2022-03-15 16:14:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.3026204564666104) internal successors, (7814), 2366 states have internal predecessors, (7814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 7814 transitions. [2022-03-15 16:14:35,035 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 7814 transitions. Word has length 24 [2022-03-15 16:14:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:35,036 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 7814 transitions. [2022-03-15 16:14:35,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 7814 transitions. [2022-03-15 16:14:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:35,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:35,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:35,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-15 16:14:35,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:35,239 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash -906129461, now seen corresponding path program 122 times [2022-03-15 16:14:35,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:35,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036261719] [2022-03-15 16:14:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:35,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:35,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036261719] [2022-03-15 16:14:35,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036261719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:35,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087478087] [2022-03-15 16:14:35,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:35,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:35,485 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:35,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 16:14:35,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:35,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:35,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:35,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:35,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:35,741 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:14:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:35,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:36,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:36,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:36,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:14:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:36,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087478087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:36,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:36,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:14:36,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208137940] [2022-03-15 16:14:36,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:36,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:14:36,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:14:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:14:36,456 INFO L87 Difference]: Start difference. First operand 2367 states and 7814 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:37,503 INFO L93 Difference]: Finished difference Result 2581 states and 8508 transitions. [2022-03-15 16:14:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:14:37,503 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 24 [2022-03-15 16:14:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:37,508 INFO L225 Difference]: With dead ends: 2581 [2022-03-15 16:14:37,508 INFO L226 Difference]: Without dead ends: 2575 [2022-03-15 16:14:37,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:14:37,509 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:37,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 113 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1432 Invalid, 0 Unknown, 306 Unchecked, 0.6s Time] [2022-03-15 16:14:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2022-03-15 16:14:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2371. [2022-03-15 16:14:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 3.3042194092827004) internal successors, (7831), 2370 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 7831 transitions. [2022-03-15 16:14:37,537 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 7831 transitions. Word has length 24 [2022-03-15 16:14:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:37,537 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 7831 transitions. [2022-03-15 16:14:37,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 7831 transitions. [2022-03-15 16:14:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:37,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:37,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:37,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-15 16:14:37,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:37,750 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1986637321, now seen corresponding path program 123 times [2022-03-15 16:14:37,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:37,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413626139] [2022-03-15 16:14:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:37,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:37,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413626139] [2022-03-15 16:14:37,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413626139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:37,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616238995] [2022-03-15 16:14:37,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:14:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:37,999 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:37,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 16:14:38,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:14:38,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:38,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:38,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 60 [2022-03-15 16:14:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:39,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:39,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:39,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:39,069 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 45 treesize of output 7 [2022-03-15 16:14:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:39,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616238995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:39,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:39,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 16:14:39,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423677933] [2022-03-15 16:14:39,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:39,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:14:39,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:14:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:14:39,101 INFO L87 Difference]: Start difference. First operand 2371 states and 7831 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:41,943 INFO L93 Difference]: Finished difference Result 3227 states and 10485 transitions. [2022-03-15 16:14:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:14:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 24 [2022-03-15 16:14:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:41,954 INFO L225 Difference]: With dead ends: 3227 [2022-03-15 16:14:41,954 INFO L226 Difference]: Without dead ends: 3207 [2022-03-15 16:14:41,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:14:41,954 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 246 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:41,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 114 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2015 Invalid, 0 Unknown, 891 Unchecked, 1.0s Time] [2022-03-15 16:14:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-15 16:14:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2400. [2022-03-15 16:14:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 3.303876615256357) internal successors, (7926), 2399 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7926 transitions. [2022-03-15 16:14:41,988 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7926 transitions. Word has length 24 [2022-03-15 16:14:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7926 transitions. [2022-03-15 16:14:41,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7926 transitions. [2022-03-15 16:14:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:41,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:41,991 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] [2022-03-15 16:14:42,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-15 16:14:42,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-15 16:14:42,192 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1846621901, now seen corresponding path program 124 times [2022-03-15 16:14:42,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:42,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753105292] [2022-03-15 16:14:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:42,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:42,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753105292] [2022-03-15 16:14:42,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753105292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:42,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368094582] [2022-03-15 16:14:42,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:42,463 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:42,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 16:14:42,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:42,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:42,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:42,684 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 30 treesize of output 16 [2022-03-15 16:14:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:42,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:43,016 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:43,016 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 20 treesize of output 43 [2022-03-15 16:14:43,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,073 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 20 treesize of output 3 [2022-03-15 16:14:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:43,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368094582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:43,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:43,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:43,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141841918] [2022-03-15 16:14:43,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:43,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:43,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:43,090 INFO L87 Difference]: Start difference. First operand 2400 states and 7926 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:44,670 INFO L93 Difference]: Finished difference Result 2831 states and 9332 transitions. [2022-03-15 16:14:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:14:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:14:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:44,675 INFO L225 Difference]: With dead ends: 2831 [2022-03-15 16:14:44,675 INFO L226 Difference]: Without dead ends: 2813 [2022-03-15 16:14:44,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:14:44,675 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:44,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 101 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1636 Invalid, 0 Unknown, 538 Unchecked, 0.7s Time] [2022-03-15 16:14:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-03-15 16:14:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2436. [2022-03-15 16:14:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.313757700205339) internal successors, (8069), 2435 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 8069 transitions. [2022-03-15 16:14:44,707 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 8069 transitions. Word has length 24 [2022-03-15 16:14:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:44,707 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 8069 transitions. [2022-03-15 16:14:44,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 8069 transitions. [2022-03-15 16:14:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:44,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:44,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:44,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-15 16:14:44,910 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,SelfDestructingSolverStorable205 [2022-03-15 16:14:44,911 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:44,911 INFO L85 PathProgramCache]: Analyzing trace with hash -338560521, now seen corresponding path program 125 times [2022-03-15 16:14:44,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:44,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147327206] [2022-03-15 16:14:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:44,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:45,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:45,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147327206] [2022-03-15 16:14:45,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147327206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:45,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044280711] [2022-03-15 16:14:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:45,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:45,163 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:45,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 16:14:45,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:14:45,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:45,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:45,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:45,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:45,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:45,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:45,376 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 23 treesize of output 39 [2022-03-15 16:14:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:45,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:45,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:45,784 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 20 treesize of output 37 [2022-03-15 16:14:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:45,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044280711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:45,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:45,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-15 16:14:45,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967499838] [2022-03-15 16:14:45,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:45,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:14:45,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:14:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:14:45,844 INFO L87 Difference]: Start difference. First operand 2436 states and 8069 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:49,450 INFO L93 Difference]: Finished difference Result 3014 states and 9665 transitions. [2022-03-15 16:14:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:14:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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 24 [2022-03-15 16:14:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:49,456 INFO L225 Difference]: With dead ends: 3014 [2022-03-15 16:14:49,456 INFO L226 Difference]: Without dead ends: 2999 [2022-03-15 16:14:49,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=661, Invalid=5981, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:14:49,457 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 343 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 3793 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:49,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 378 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3793 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 16:14:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-03-15 16:14:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2444. [2022-03-15 16:14:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.316823577568563) internal successors, (8103), 2443 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 8103 transitions. [2022-03-15 16:14:49,506 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 8103 transitions. Word has length 24 [2022-03-15 16:14:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 8103 transitions. [2022-03-15 16:14:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 8103 transitions. [2022-03-15 16:14:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:49,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:49,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:49,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-15 16:14:49,710 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,SelfDestructingSolverStorable206 [2022-03-15 16:14:49,710 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1851008737, now seen corresponding path program 126 times [2022-03-15 16:14:49,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:49,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467704765] [2022-03-15 16:14:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:49,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:49,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:49,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467704765] [2022-03-15 16:14:49,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467704765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:49,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478016880] [2022-03-15 16:14:49,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:49,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:49,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:49,982 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:49,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 16:14:50,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:14:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:50,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:50,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:50,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:14:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:50,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:50,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:50,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:50,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:14:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:51,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478016880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:51,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:51,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:14:51,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390538641] [2022-03-15 16:14:51,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:51,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:14:51,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:14:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:14:51,035 INFO L87 Difference]: Start difference. First operand 2444 states and 8103 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:52,449 INFO L93 Difference]: Finished difference Result 2687 states and 8873 transitions. [2022-03-15 16:14:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:14:52,450 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 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 24 [2022-03-15 16:14:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:52,454 INFO L225 Difference]: With dead ends: 2687 [2022-03-15 16:14:52,454 INFO L226 Difference]: Without dead ends: 2673 [2022-03-15 16:14:52,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:14:52,455 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:52,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 98 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1975 Invalid, 0 Unknown, 262 Unchecked, 0.9s Time] [2022-03-15 16:14:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-03-15 16:14:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2448. [2022-03-15 16:14:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 3.315488353085411) internal successors, (8113), 2447 states have internal predecessors, (8113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 8113 transitions. [2022-03-15 16:14:52,483 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 8113 transitions. Word has length 24 [2022-03-15 16:14:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:52,483 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 8113 transitions. [2022-03-15 16:14:52,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 8113 transitions. [2022-03-15 16:14:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:52,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:52,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:52,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-15 16:14:52,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:52,686 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash -66820087, now seen corresponding path program 127 times [2022-03-15 16:14:52,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:52,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79276465] [2022-03-15 16:14:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:52,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:52,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79276465] [2022-03-15 16:14:52,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79276465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:52,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056291753] [2022-03-15 16:14:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:14:52,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:52,993 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:52,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 16:14:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:14:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:53,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:53,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:53,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-15 16:14:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:53,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:53,571 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:14:53,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:14:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:53,627 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 20 treesize of output 3 [2022-03-15 16:14:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:53,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056291753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:53,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:53,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:14:53,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671812410] [2022-03-15 16:14:53,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:14:53,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:14:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:14:53,644 INFO L87 Difference]: Start difference. First operand 2448 states and 8113 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:55,297 INFO L93 Difference]: Finished difference Result 2794 states and 9212 transitions. [2022-03-15 16:14:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:14:55,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:14:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:55,303 INFO L225 Difference]: With dead ends: 2794 [2022-03-15 16:14:55,303 INFO L226 Difference]: Without dead ends: 2777 [2022-03-15 16:14:55,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:14:55,303 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:55,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 99 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1884 Invalid, 0 Unknown, 480 Unchecked, 0.8s Time] [2022-03-15 16:14:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-03-15 16:14:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2474. [2022-03-15 16:14:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.3255155681358675) internal successors, (8224), 2473 states have internal predecessors, (8224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8224 transitions. [2022-03-15 16:14:55,359 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8224 transitions. Word has length 24 [2022-03-15 16:14:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:55,359 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 8224 transitions. [2022-03-15 16:14:55,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8224 transitions. [2022-03-15 16:14:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:55,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:55,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:55,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-15 16:14:55,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:55,563 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1667257941, now seen corresponding path program 128 times [2022-03-15 16:14:55,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:55,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607830669] [2022-03-15 16:14:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:55,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:55,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607830669] [2022-03-15 16:14:55,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607830669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:55,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316900772] [2022-03-15 16:14:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:55,806 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:55,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 16:14:55,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:55,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:56,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:56,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:56,066 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:14:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:56,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:56,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:56,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:56,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:14:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:56,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316900772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:56,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:56,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:14:56,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133776295] [2022-03-15 16:14:56,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:56,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:14:56,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:14:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:14:56,851 INFO L87 Difference]: Start difference. First operand 2474 states and 8224 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:58,183 INFO L93 Difference]: Finished difference Result 2838 states and 9378 transitions. [2022-03-15 16:14:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:14:58,184 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 24 [2022-03-15 16:14:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:58,189 INFO L225 Difference]: With dead ends: 2838 [2022-03-15 16:14:58,189 INFO L226 Difference]: Without dead ends: 2823 [2022-03-15 16:14:58,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:14:58,190 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:58,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 101 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1753 Invalid, 0 Unknown, 527 Unchecked, 0.8s Time] [2022-03-15 16:14:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-03-15 16:14:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2498. [2022-03-15 16:14:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 3.329195034040849) internal successors, (8313), 2497 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8313 transitions. [2022-03-15 16:14:58,236 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8313 transitions. Word has length 24 [2022-03-15 16:14:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:58,236 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8313 transitions. [2022-03-15 16:14:58,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8313 transitions. [2022-03-15 16:14:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:14:58,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:58,239 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] [2022-03-15 16:14:58,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-15 16:14:58,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:58,439 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:14:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1534073149, now seen corresponding path program 129 times [2022-03-15 16:14:58,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:58,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509746622] [2022-03-15 16:14:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:58,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:58,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509746622] [2022-03-15 16:14:58,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509746622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:58,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911861534] [2022-03-15 16:14:58,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:14:58,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:58,684 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 16:14:58,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:14:58,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:14:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:59,074 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 33 treesize of output 21 [2022-03-15 16:14:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:59,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:59,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:59,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:14:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:59,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911861534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:59,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:59,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:14:59,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798601365] [2022-03-15 16:14:59,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:59,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:14:59,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:14:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:14:59,625 INFO L87 Difference]: Start difference. First operand 2498 states and 8313 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:00,649 INFO L93 Difference]: Finished difference Result 2856 states and 9431 transitions. [2022-03-15 16:15:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:15:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:15:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:00,654 INFO L225 Difference]: With dead ends: 2856 [2022-03-15 16:15:00,654 INFO L226 Difference]: Without dead ends: 2850 [2022-03-15 16:15:00,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:15:00,655 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:00,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 110 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1389 Invalid, 0 Unknown, 418 Unchecked, 0.6s Time] [2022-03-15 16:15:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-03-15 16:15:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2500. [2022-03-15 16:15:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 3.3297318927571027) internal successors, (8321), 2499 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 8321 transitions. [2022-03-15 16:15:00,685 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 8321 transitions. Word has length 24 [2022-03-15 16:15:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:00,685 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 8321 transitions. [2022-03-15 16:15:00,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 8321 transitions. [2022-03-15 16:15:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:00,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:00,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:00,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-15 16:15:00,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-15 16:15:00,888 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1436105503, now seen corresponding path program 130 times [2022-03-15 16:15:00,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:00,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894007992] [2022-03-15 16:15:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:00,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:01,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:01,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894007992] [2022-03-15 16:15:01,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894007992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:01,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296198167] [2022-03-15 16:15:01,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:15:01,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:01,160 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:01,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 16:15:01,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:15:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:01,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:01,434 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 37 treesize of output 21 [2022-03-15 16:15:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:01,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:01,768 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:01,769 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 20 treesize of output 43 [2022-03-15 16:15:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:01,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:15:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:01,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296198167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:01,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:01,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:01,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592334641] [2022-03-15 16:15:01,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:01,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:01,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:01,844 INFO L87 Difference]: Start difference. First operand 2500 states and 8321 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:02,999 INFO L93 Difference]: Finished difference Result 2894 states and 9561 transitions. [2022-03-15 16:15:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:15:02,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:15:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:03,004 INFO L225 Difference]: With dead ends: 2894 [2022-03-15 16:15:03,004 INFO L226 Difference]: Without dead ends: 2886 [2022-03-15 16:15:03,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:15:03,005 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:03,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 93 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1366 Invalid, 0 Unknown, 295 Unchecked, 0.6s Time] [2022-03-15 16:15:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-03-15 16:15:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2501. [2022-03-15 16:15:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 3.3304) internal successors, (8326), 2500 states have internal predecessors, (8326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 8326 transitions. [2022-03-15 16:15:03,034 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 8326 transitions. Word has length 24 [2022-03-15 16:15:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 8326 transitions. [2022-03-15 16:15:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 8326 transitions. [2022-03-15 16:15:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:03,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:03,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:03,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-15 16:15:03,238 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,SelfDestructingSolverStorable211 [2022-03-15 16:15:03,238 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2084000377, now seen corresponding path program 131 times [2022-03-15 16:15:03,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:03,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200334229] [2022-03-15 16:15:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:03,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:03,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200334229] [2022-03-15 16:15:03,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200334229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:03,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269530352] [2022-03-15 16:15:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:15:03,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:03,539 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:03,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 16:15:03,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:15:03,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:03,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:03,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:03,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:03,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:03,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:03,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:03,872 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 17 [2022-03-15 16:15:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:03,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:04,219 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:04,219 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 20 treesize of output 43 [2022-03-15 16:15:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,284 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 20 treesize of output 3 [2022-03-15 16:15:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:04,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269530352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:04,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:04,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:04,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696846009] [2022-03-15 16:15:04,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:04,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:04,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:04,302 INFO L87 Difference]: Start difference. First operand 2501 states and 8326 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:05,587 INFO L93 Difference]: Finished difference Result 3110 states and 10102 transitions. [2022-03-15 16:15:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:15:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:15:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:05,594 INFO L225 Difference]: With dead ends: 3110 [2022-03-15 16:15:05,594 INFO L226 Difference]: Without dead ends: 3101 [2022-03-15 16:15:05,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:15:05,595 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 846 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:05,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 167 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1605 Invalid, 0 Unknown, 846 Unchecked, 0.7s Time] [2022-03-15 16:15:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2022-03-15 16:15:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2505. [2022-03-15 16:15:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.332667731629393) internal successors, (8345), 2504 states have internal predecessors, (8345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8345 transitions. [2022-03-15 16:15:05,649 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8345 transitions. Word has length 24 [2022-03-15 16:15:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:05,649 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 8345 transitions. [2022-03-15 16:15:05,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8345 transitions. [2022-03-15 16:15:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:05,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:05,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:05,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-15 16:15:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-15 16:15:05,853 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1481789116, now seen corresponding path program 17 times [2022-03-15 16:15:05,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:05,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410776057] [2022-03-15 16:15:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:06,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:06,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410776057] [2022-03-15 16:15:06,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410776057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:06,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230602737] [2022-03-15 16:15:06,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:15:06,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:06,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:06,094 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:06,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 16:15:06,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:15:06,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:06,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:06,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:06,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:06,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:15:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:06,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:06,709 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:06,709 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 20 treesize of output 43 [2022-03-15 16:15:06,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:06,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:06,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:15:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:06,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230602737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:06,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:06,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:06,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235486910] [2022-03-15 16:15:06,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:06,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:06,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:06,774 INFO L87 Difference]: Start difference. First operand 2505 states and 8345 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:07,968 INFO L93 Difference]: Finished difference Result 2907 states and 9603 transitions. [2022-03-15 16:15:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:15:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:15:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:07,973 INFO L225 Difference]: With dead ends: 2907 [2022-03-15 16:15:07,974 INFO L226 Difference]: Without dead ends: 2900 [2022-03-15 16:15:07,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:15:07,974 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:07,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 86 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1458 Invalid, 0 Unknown, 230 Unchecked, 0.6s Time] [2022-03-15 16:15:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2022-03-15 16:15:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2503. [2022-03-15 16:15:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.332933653077538) internal successors, (8339), 2502 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-03-15 16:15:08,005 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-03-15 16:15:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:08,005 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-03-15 16:15:08,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-03-15 16:15:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:08,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:08,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:08,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-03-15 16:15:08,209 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,SelfDestructingSolverStorable213 [2022-03-15 16:15:08,209 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash 73429867, now seen corresponding path program 132 times [2022-03-15 16:15:08,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:08,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101183043] [2022-03-15 16:15:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:08,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:08,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101183043] [2022-03-15 16:15:08,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101183043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:08,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292607955] [2022-03-15 16:15:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:15:08,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:08,450 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:08,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 16:15:08,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:15:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:08,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:15:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:08,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:08,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:08,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:08,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:08,881 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 31 treesize of output 43 [2022-03-15 16:15:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:09,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:09,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:09,817 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 41 treesize of output 7 [2022-03-15 16:15:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:09,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292607955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:09,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:09,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:15:09,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901666800] [2022-03-15 16:15:09,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:09,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:15:09,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:15:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:15:09,852 INFO L87 Difference]: Start difference. First operand 2503 states and 8339 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:11,934 INFO L93 Difference]: Finished difference Result 3159 states and 10415 transitions. [2022-03-15 16:15:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:15:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:15:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:11,940 INFO L225 Difference]: With dead ends: 3159 [2022-03-15 16:15:11,940 INFO L226 Difference]: Without dead ends: 3151 [2022-03-15 16:15:11,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=343, Invalid=3947, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:15:11,941 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 143 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:11,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 123 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1279 Invalid, 0 Unknown, 615 Unchecked, 0.6s Time] [2022-03-15 16:15:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-03-15 16:15:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2503. [2022-03-15 16:15:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.332933653077538) internal successors, (8339), 2502 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-03-15 16:15:11,985 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-03-15 16:15:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:11,985 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-03-15 16:15:11,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-03-15 16:15:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:11,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:11,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:12,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-15 16:15:12,189 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,SelfDestructingSolverStorable214 [2022-03-15 16:15:12,189 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2115913133, now seen corresponding path program 133 times [2022-03-15 16:15:12,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:12,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508260202] [2022-03-15 16:15:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:12,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:12,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508260202] [2022-03-15 16:15:12,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508260202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:12,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061271966] [2022-03-15 16:15:12,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:15:12,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:12,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:12,467 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:12,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 16:15:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:12,755 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 17 [2022-03-15 16:15:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:12,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:13,093 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:13,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:15:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:13,138 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:15:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:13,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061271966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:13,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:13,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:13,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795992734] [2022-03-15 16:15:13,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:13,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:13,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:13,156 INFO L87 Difference]: Start difference. First operand 2503 states and 8339 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:14,570 INFO L93 Difference]: Finished difference Result 3031 states and 9878 transitions. [2022-03-15 16:15:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:15:14,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:15:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:14,576 INFO L225 Difference]: With dead ends: 3031 [2022-03-15 16:15:14,576 INFO L226 Difference]: Without dead ends: 3024 [2022-03-15 16:15:14,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:15:14,577 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:14,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 210 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1398 Invalid, 0 Unknown, 781 Unchecked, 0.6s Time] [2022-03-15 16:15:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-03-15 16:15:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2486. [2022-03-15 16:15:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.3356136820925553) internal successors, (8289), 2485 states have internal predecessors, (8289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 8289 transitions. [2022-03-15 16:15:14,613 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 8289 transitions. Word has length 24 [2022-03-15 16:15:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:14,613 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 8289 transitions. [2022-03-15 16:15:14,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 8289 transitions. [2022-03-15 16:15:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:14,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:14,616 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] [2022-03-15 16:15:14,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-15 16:15:14,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-15 16:15:14,817 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash -284422353, now seen corresponding path program 134 times [2022-03-15 16:15:14,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:14,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564911343] [2022-03-15 16:15:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:15,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:15,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564911343] [2022-03-15 16:15:15,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564911343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:15,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381272613] [2022-03-15 16:15:15,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:15:15,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:15,071 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:15,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 16:15:15,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:15:15,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:15,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:15,386 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:15:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:15,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:16,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:16,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:16,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:15:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:16,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381272613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:16,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:16,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:15:16,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808340418] [2022-03-15 16:15:16,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:16,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:15:16,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:16,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:15:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:15:16,322 INFO L87 Difference]: Start difference. First operand 2486 states and 8289 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:18,430 INFO L93 Difference]: Finished difference Result 3517 states and 11744 transitions. [2022-03-15 16:15:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:15:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:15:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:18,437 INFO L225 Difference]: With dead ends: 3517 [2022-03-15 16:15:18,437 INFO L226 Difference]: Without dead ends: 3513 [2022-03-15 16:15:18,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:15:18,437 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:18,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 249 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1110 Invalid, 0 Unknown, 785 Unchecked, 0.5s Time] [2022-03-15 16:15:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-03-15 16:15:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2498. [2022-03-15 16:15:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 3.3360032038446135) internal successors, (8330), 2497 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8330 transitions. [2022-03-15 16:15:18,475 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8330 transitions. Word has length 24 [2022-03-15 16:15:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:18,475 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8330 transitions. [2022-03-15 16:15:18,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8330 transitions. [2022-03-15 16:15:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:18,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:18,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:18,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-15 16:15:18,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:18,679 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash 603081328, now seen corresponding path program 21 times [2022-03-15 16:15:18,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:18,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750636949] [2022-03-15 16:15:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:18,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:18,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750636949] [2022-03-15 16:15:18,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750636949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:18,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59342284] [2022-03-15 16:15:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:15:18,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:18,925 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:18,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 16:15:18,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:15:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:19,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:19,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:19,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:19,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:19,293 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 29 treesize of output 17 [2022-03-15 16:15:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:19,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:19,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:19,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:19,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:15:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:19,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59342284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:19,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:19,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:15:19,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347286827] [2022-03-15 16:15:19,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:19,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:15:19,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:19,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:15:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:15:19,862 INFO L87 Difference]: Start difference. First operand 2498 states and 8330 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:22,484 INFO L93 Difference]: Finished difference Result 3311 states and 10477 transitions. [2022-03-15 16:15:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:15:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:15:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:22,490 INFO L225 Difference]: With dead ends: 3311 [2022-03-15 16:15:22,490 INFO L226 Difference]: Without dead ends: 3279 [2022-03-15 16:15:22,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=442, Invalid=4250, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:15:22,491 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 341 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1622 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:22,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 243 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2170 Invalid, 0 Unknown, 1622 Unchecked, 1.0s Time] [2022-03-15 16:15:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-03-15 16:15:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2547. [2022-03-15 16:15:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.332678711704635) internal successors, (8485), 2546 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8485 transitions. [2022-03-15 16:15:22,542 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8485 transitions. Word has length 24 [2022-03-15 16:15:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:22,542 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 8485 transitions. [2022-03-15 16:15:22,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8485 transitions. [2022-03-15 16:15:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:22,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:22,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:22,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-15 16:15:22,745 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,SelfDestructingSolverStorable217 [2022-03-15 16:15:22,746 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 713052612, now seen corresponding path program 18 times [2022-03-15 16:15:22,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:22,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111710252] [2022-03-15 16:15:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:22,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:22,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111710252] [2022-03-15 16:15:22,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111710252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:22,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119440849] [2022-03-15 16:15:22,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:15:22,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:22,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:22,988 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:22,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 16:15:23,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:15:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:23,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:23,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:23,306 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:15:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:23,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:24,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:24,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:24,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:24,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:15:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:24,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119440849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:24,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:24,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:15:24,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684981543] [2022-03-15 16:15:24,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:24,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:15:24,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:15:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:15:24,144 INFO L87 Difference]: Start difference. First operand 2547 states and 8485 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:26,710 INFO L93 Difference]: Finished difference Result 3638 states and 12393 transitions. [2022-03-15 16:15:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:15:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 24 [2022-03-15 16:15:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:26,717 INFO L225 Difference]: With dead ends: 3638 [2022-03-15 16:15:26,717 INFO L226 Difference]: Without dead ends: 3625 [2022-03-15 16:15:26,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=427, Invalid=3233, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:15:26,718 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 165 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1486 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:26,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 94 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 996 Invalid, 0 Unknown, 1486 Unchecked, 0.5s Time] [2022-03-15 16:15:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2022-03-15 16:15:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 2574. [2022-03-15 16:15:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2573 states have (on average 3.3416245627671977) internal successors, (8598), 2573 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 8598 transitions. [2022-03-15 16:15:26,757 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 8598 transitions. Word has length 24 [2022-03-15 16:15:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:26,757 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 8598 transitions. [2022-03-15 16:15:26,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 8598 transitions. [2022-03-15 16:15:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:26,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:26,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:26,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-15 16:15:26,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:26,961 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1363030483, now seen corresponding path program 135 times [2022-03-15 16:15:26,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:26,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670574644] [2022-03-15 16:15:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:27,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:27,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670574644] [2022-03-15 16:15:27,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670574644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:27,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108769655] [2022-03-15 16:15:27,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:15:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:27,203 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:27,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 16:15:27,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:15:27,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:27,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:27,545 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 17 [2022-03-15 16:15:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:27,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:27,833 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:27,833 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 20 treesize of output 43 [2022-03-15 16:15:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:27,889 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 20 treesize of output 3 [2022-03-15 16:15:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:27,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108769655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:27,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:27,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:27,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426354048] [2022-03-15 16:15:27,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:27,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:27,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:27,906 INFO L87 Difference]: Start difference. First operand 2574 states and 8598 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:29,449 INFO L93 Difference]: Finished difference Result 3329 states and 10831 transitions. [2022-03-15 16:15:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:15:29,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 24 [2022-03-15 16:15:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:29,456 INFO L225 Difference]: With dead ends: 3329 [2022-03-15 16:15:29,456 INFO L226 Difference]: Without dead ends: 3319 [2022-03-15 16:15:29,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:15:29,457 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 154 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:29,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 255 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1763 Invalid, 0 Unknown, 689 Unchecked, 0.8s Time] [2022-03-15 16:15:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-03-15 16:15:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2587. [2022-03-15 16:15:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3422273781902554) internal successors, (8643), 2586 states have internal predecessors, (8643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8643 transitions. [2022-03-15 16:15:29,495 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8643 transitions. Word has length 24 [2022-03-15 16:15:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8643 transitions. [2022-03-15 16:15:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8643 transitions. [2022-03-15 16:15:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:29,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:29,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:29,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-15 16:15:29,699 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,SelfDestructingSolverStorable219 [2022-03-15 16:15:29,699 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:29,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1170717186, now seen corresponding path program 19 times [2022-03-15 16:15:29,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:29,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646995668] [2022-03-15 16:15:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:29,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:29,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646995668] [2022-03-15 16:15:29,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646995668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:29,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806496063] [2022-03-15 16:15:29,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:15:29,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:29,945 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:29,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 16:15:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,225 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 37 treesize of output 21 [2022-03-15 16:15:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:30,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:30,579 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:30,579 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 20 treesize of output 43 [2022-03-15 16:15:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,645 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 20 treesize of output 3 [2022-03-15 16:15:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:30,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806496063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:30,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:30,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:30,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983662409] [2022-03-15 16:15:30,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:30,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:30,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:30,666 INFO L87 Difference]: Start difference. First operand 2587 states and 8643 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:32,067 INFO L93 Difference]: Finished difference Result 3170 states and 10315 transitions. [2022-03-15 16:15:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:15:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:15:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:32,073 INFO L225 Difference]: With dead ends: 3170 [2022-03-15 16:15:32,074 INFO L226 Difference]: Without dead ends: 3162 [2022-03-15 16:15:32,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:15:32,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:32,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1781 Invalid, 0 Unknown, 658 Unchecked, 0.8s Time] [2022-03-15 16:15:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-03-15 16:15:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2577. [2022-03-15 16:15:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 3.340062111801242) internal successors, (8604), 2576 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 8604 transitions. [2022-03-15 16:15:32,122 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 8604 transitions. Word has length 24 [2022-03-15 16:15:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:32,122 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 8604 transitions. [2022-03-15 16:15:32,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 8604 transitions. [2022-03-15 16:15:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:32,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:32,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-15 16:15:32,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:32,326 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1867982233, now seen corresponding path program 136 times [2022-03-15 16:15:32,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:32,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507581552] [2022-03-15 16:15:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:32,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:32,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507581552] [2022-03-15 16:15:32,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507581552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:32,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971386789] [2022-03-15 16:15:32,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:15:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:32,583 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:32,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 16:15:32,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:15:32,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:32,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:32,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:32,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:32,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:32,869 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 17 [2022-03-15 16:15:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:32,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:33,212 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:33,212 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 20 treesize of output 43 [2022-03-15 16:15:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:33,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:33,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:33,267 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 20 treesize of output 3 [2022-03-15 16:15:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:33,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971386789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:33,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:33,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:33,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738085297] [2022-03-15 16:15:33,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:33,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:33,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:33,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:33,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:33,285 INFO L87 Difference]: Start difference. First operand 2577 states and 8604 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:34,849 INFO L93 Difference]: Finished difference Result 3205 states and 10398 transitions. [2022-03-15 16:15:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:15:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 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 24 [2022-03-15 16:15:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:34,856 INFO L225 Difference]: With dead ends: 3205 [2022-03-15 16:15:34,856 INFO L226 Difference]: Without dead ends: 3196 [2022-03-15 16:15:34,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:15:34,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1029 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:34,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 173 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1655 Invalid, 0 Unknown, 1029 Unchecked, 0.7s Time] [2022-03-15 16:15:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-03-15 16:15:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2562. [2022-03-15 16:15:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 3.3389301054275675) internal successors, (8551), 2561 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 8551 transitions. [2022-03-15 16:15:34,906 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 8551 transitions. Word has length 24 [2022-03-15 16:15:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:34,907 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 8551 transitions. [2022-03-15 16:15:34,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 8551 transitions. [2022-03-15 16:15:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:34,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:34,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:34,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-15 16:15:35,110 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,SelfDestructingSolverStorable221 [2022-03-15 16:15:35,110 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1738899514, now seen corresponding path program 20 times [2022-03-15 16:15:35,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:35,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588135690] [2022-03-15 16:15:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:35,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:35,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588135690] [2022-03-15 16:15:35,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588135690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:35,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241696296] [2022-03-15 16:15:35,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:15:35,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:35,363 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:35,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 16:15:35,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:15:35,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:35,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:35,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:35,684 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:15:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:35,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:36,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:36,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:15:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:36,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241696296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:36,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:36,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:15:36,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558840346] [2022-03-15 16:15:36,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:36,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:15:36,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:36,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:15:36,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:15:36,546 INFO L87 Difference]: Start difference. First operand 2562 states and 8551 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:39,882 INFO L93 Difference]: Finished difference Result 3914 states and 13354 transitions. [2022-03-15 16:15:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:15:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:15:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:39,891 INFO L225 Difference]: With dead ends: 3914 [2022-03-15 16:15:39,891 INFO L226 Difference]: Without dead ends: 3907 [2022-03-15 16:15:39,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=571, Invalid=4121, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:15:39,892 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1270 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:39,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 189 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1038 Invalid, 0 Unknown, 1270 Unchecked, 0.5s Time] [2022-03-15 16:15:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-03-15 16:15:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2586. [2022-03-15 16:15:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 3.34468085106383) internal successors, (8646), 2585 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 8646 transitions. [2022-03-15 16:15:39,956 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 8646 transitions. Word has length 24 [2022-03-15 16:15:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:39,956 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 8646 transitions. [2022-03-15 16:15:39,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 8646 transitions. [2022-03-15 16:15:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:39,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:39,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:39,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-15 16:15:40,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:40,160 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 957867473, now seen corresponding path program 137 times [2022-03-15 16:15:40,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:40,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007239978] [2022-03-15 16:15:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:40,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:40,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007239978] [2022-03-15 16:15:40,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007239978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:40,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164556416] [2022-03-15 16:15:40,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:15:40,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:40,418 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-15 16:15:40,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:15:40,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:40,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:40,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:40,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:40,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:40,707 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-03-15 16:15:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:41,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:41,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:41,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:41,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:41,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:41,578 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 37 treesize of output 7 [2022-03-15 16:15:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:41,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164556416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:41,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:41,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 16:15:41,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059048409] [2022-03-15 16:15:41,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:41,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:15:41,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:15:41,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:15:41,621 INFO L87 Difference]: Start difference. First operand 2586 states and 8646 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:42,576 INFO L93 Difference]: Finished difference Result 2691 states and 8950 transitions. [2022-03-15 16:15:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:15:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 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 24 [2022-03-15 16:15:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:42,581 INFO L225 Difference]: With dead ends: 2691 [2022-03-15 16:15:42,582 INFO L226 Difference]: Without dead ends: 2684 [2022-03-15 16:15:42,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:15:42,582 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:42,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 110 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 649 Invalid, 0 Unknown, 415 Unchecked, 0.3s Time] [2022-03-15 16:15:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2022-03-15 16:15:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2587. [2022-03-15 16:15:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3437741686001545) internal successors, (8647), 2586 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8647 transitions. [2022-03-15 16:15:42,614 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8647 transitions. Word has length 24 [2022-03-15 16:15:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:42,614 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8647 transitions. [2022-03-15 16:15:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8647 transitions. [2022-03-15 16:15:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:42,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:42,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:42,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-15 16:15:42,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-15 16:15:42,818 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1861458294, now seen corresponding path program 22 times [2022-03-15 16:15:42,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:42,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100005961] [2022-03-15 16:15:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:43,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:43,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100005961] [2022-03-15 16:15:43,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100005961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:43,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363443897] [2022-03-15 16:15:43,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:15:43,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:43,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:43,089 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:43,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-15 16:15:43,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:15:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:43,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:43,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:43,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:43,322 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 34 treesize of output 20 [2022-03-15 16:15:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:43,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:43,655 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:43,655 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 20 treesize of output 43 [2022-03-15 16:15:43,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:43,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:43,709 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 20 treesize of output 3 [2022-03-15 16:15:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:43,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363443897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:43,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:43,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:43,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335504489] [2022-03-15 16:15:43,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:43,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:43,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:43,728 INFO L87 Difference]: Start difference. First operand 2587 states and 8647 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:44,851 INFO L93 Difference]: Finished difference Result 2853 states and 9514 transitions. [2022-03-15 16:15:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:15:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:15:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:44,857 INFO L225 Difference]: With dead ends: 2853 [2022-03-15 16:15:44,857 INFO L226 Difference]: Without dead ends: 2845 [2022-03-15 16:15:44,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:15:44,857 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:44,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 78 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1476 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-03-15 16:15:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-03-15 16:15:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2579. [2022-03-15 16:15:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 3.342901474010861) internal successors, (8618), 2578 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 8618 transitions. [2022-03-15 16:15:44,889 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 8618 transitions. Word has length 24 [2022-03-15 16:15:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 8618 transitions. [2022-03-15 16:15:44,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 8618 transitions. [2022-03-15 16:15:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:44,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:44,892 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] [2022-03-15 16:15:44,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-15 16:15:45,093 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,SelfDestructingSolverStorable224 [2022-03-15 16:15:45,093 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1245375153, now seen corresponding path program 138 times [2022-03-15 16:15:45,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:45,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964993402] [2022-03-15 16:15:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:45,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:45,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964993402] [2022-03-15 16:15:45,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964993402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:45,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397432454] [2022-03-15 16:15:45,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:15:45,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:45,363 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:45,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-15 16:15:45,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:15:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:45,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:45,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:45,650 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-03-15 16:15:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:45,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:46,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:46,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:46,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:15:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:46,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397432454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:46,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:46,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:15:46,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657722129] [2022-03-15 16:15:46,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:46,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:15:46,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:15:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:15:46,429 INFO L87 Difference]: Start difference. First operand 2579 states and 8618 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:48,212 INFO L93 Difference]: Finished difference Result 2959 states and 9749 transitions. [2022-03-15 16:15:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:15:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 24 [2022-03-15 16:15:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:48,218 INFO L225 Difference]: With dead ends: 2959 [2022-03-15 16:15:48,218 INFO L226 Difference]: Without dead ends: 2948 [2022-03-15 16:15:48,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:15:48,218 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:48,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 139 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2008 Invalid, 0 Unknown, 598 Unchecked, 0.9s Time] [2022-03-15 16:15:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-03-15 16:15:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2588. [2022-03-15 16:15:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 3.342481638964051) internal successors, (8647), 2587 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 8647 transitions. [2022-03-15 16:15:48,251 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 8647 transitions. Word has length 24 [2022-03-15 16:15:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:48,251 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 8647 transitions. [2022-03-15 16:15:48,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 8647 transitions. [2022-03-15 16:15:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:48,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:48,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:48,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:48,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:48,454 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:48,455 INFO L85 PathProgramCache]: Analyzing trace with hash 436461757, now seen corresponding path program 139 times [2022-03-15 16:15:48,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:48,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222388362] [2022-03-15 16:15:48,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:48,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:48,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:48,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222388362] [2022-03-15 16:15:48,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222388362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:48,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820167420] [2022-03-15 16:15:48,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:15:48,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:48,727 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:48,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-15 16:15:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:48,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:48,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:48,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:48,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:48,979 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 34 treesize of output 20 [2022-03-15 16:15:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:49,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:49,320 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:49,320 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 20 treesize of output 43 [2022-03-15 16:15:49,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:49,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:49,378 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 20 treesize of output 3 [2022-03-15 16:15:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:49,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820167420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:49,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:49,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:49,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141469490] [2022-03-15 16:15:49,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:49,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:49,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:49,396 INFO L87 Difference]: Start difference. First operand 2588 states and 8647 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:50,473 INFO L93 Difference]: Finished difference Result 2858 states and 9526 transitions. [2022-03-15 16:15:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:15:50,474 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:15:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:50,479 INFO L225 Difference]: With dead ends: 2858 [2022-03-15 16:15:50,479 INFO L226 Difference]: Without dead ends: 2850 [2022-03-15 16:15:50,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:15:50,479 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:50,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 78 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1461 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-03-15 16:15:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-03-15 16:15:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2587. [2022-03-15 16:15:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 3.3445475638051043) internal successors, (8649), 2586 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8649 transitions. [2022-03-15 16:15:50,513 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8649 transitions. Word has length 24 [2022-03-15 16:15:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:50,513 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8649 transitions. [2022-03-15 16:15:50,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8649 transitions. [2022-03-15 16:15:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:50,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:50,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:50,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-15 16:15:50,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:50,717 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash -836471951, now seen corresponding path program 140 times [2022-03-15 16:15:50,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:50,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352412788] [2022-03-15 16:15:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:50,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:50,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352412788] [2022-03-15 16:15:50,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352412788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:50,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149075277] [2022-03-15 16:15:50,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:15:50,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:50,979 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:50,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-15 16:15:51,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:15:51,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:51,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:15:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:51,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:51,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:51,261 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:15:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:51,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:51,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:51,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-15 16:15:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:52,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149075277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:52,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:52,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:15:52,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544355225] [2022-03-15 16:15:52,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:52,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:15:52,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:15:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:15:52,064 INFO L87 Difference]: Start difference. First operand 2587 states and 8649 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:54,288 INFO L93 Difference]: Finished difference Result 2909 states and 9613 transitions. [2022-03-15 16:15:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:15:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 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 24 [2022-03-15 16:15:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:54,294 INFO L225 Difference]: With dead ends: 2909 [2022-03-15 16:15:54,294 INFO L226 Difference]: Without dead ends: 2879 [2022-03-15 16:15:54,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:15:54,294 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:54,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 155 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2143 Invalid, 0 Unknown, 497 Unchecked, 1.0s Time] [2022-03-15 16:15:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-03-15 16:15:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2584. [2022-03-15 16:15:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 3.3441734417344176) internal successors, (8638), 2583 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 8638 transitions. [2022-03-15 16:15:54,332 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 8638 transitions. Word has length 24 [2022-03-15 16:15:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 8638 transitions. [2022-03-15 16:15:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 8638 transitions. [2022-03-15 16:15:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:54,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:54,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:54,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-15 16:15:54,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-15 16:15:54,536 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1085292758, now seen corresponding path program 23 times [2022-03-15 16:15:54,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:54,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323701758] [2022-03-15 16:15:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:54,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:54,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323701758] [2022-03-15 16:15:54,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323701758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:54,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890268436] [2022-03-15 16:15:54,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:15:54,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:54,818 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:54,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-15 16:15:54,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:15:54,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:54,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:55,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:55,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:55,106 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 17 [2022-03-15 16:15:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:55,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:55,436 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:15:55,436 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 20 treesize of output 43 [2022-03-15 16:15:55,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:55,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:55,476 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 20 treesize of output 3 [2022-03-15 16:15:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:55,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890268436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:55,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:55,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:15:55,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189045315] [2022-03-15 16:15:55,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:55,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:15:55,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:15:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:15:55,493 INFO L87 Difference]: Start difference. First operand 2584 states and 8638 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:56,978 INFO L93 Difference]: Finished difference Result 2900 states and 9639 transitions. [2022-03-15 16:15:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:15:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:15:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:56,984 INFO L225 Difference]: With dead ends: 2900 [2022-03-15 16:15:56,984 INFO L226 Difference]: Without dead ends: 2892 [2022-03-15 16:15:56,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:15:56,984 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:56,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1459 Invalid, 0 Unknown, 288 Unchecked, 0.7s Time] [2022-03-15 16:15:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-03-15 16:15:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2594. [2022-03-15 16:15:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.34631700732742) internal successors, (8677), 2593 states have internal predecessors, (8677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 8677 transitions. [2022-03-15 16:15:57,021 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 8677 transitions. Word has length 24 [2022-03-15 16:15:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:57,021 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 8677 transitions. [2022-03-15 16:15:57,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 8677 transitions. [2022-03-15 16:15:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:15:57,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:57,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:57,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-15 16:15:57,225 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,SelfDestructingSolverStorable228 [2022-03-15 16:15:57,225 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:15:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1238024875, now seen corresponding path program 141 times [2022-03-15 16:15:57,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:57,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403924596] [2022-03-15 16:15:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:57,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:57,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403924596] [2022-03-15 16:15:57,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403924596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:57,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549924649] [2022-03-15 16:15:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:15:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:57,526 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:57,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-15 16:15:57,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:15:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:15:57,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:57,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:57,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:57,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 56 [2022-03-15 16:15:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:58,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:58,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:58,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:58,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:58,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:58,625 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 46 treesize of output 9 [2022-03-15 16:15:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:58,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549924649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:58,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:58,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-15 16:15:58,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816493504] [2022-03-15 16:15:58,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:58,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:15:58,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:15:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:15:58,659 INFO L87 Difference]: Start difference. First operand 2594 states and 8677 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:02,655 INFO L93 Difference]: Finished difference Result 3381 states and 11015 transitions. [2022-03-15 16:16:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 16:16:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 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 24 [2022-03-15 16:16:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:02,662 INFO L225 Difference]: With dead ends: 3381 [2022-03-15 16:16:02,662 INFO L226 Difference]: Without dead ends: 3357 [2022-03-15 16:16:02,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=766, Invalid=6890, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:16:02,663 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 351 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 818 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:02,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 115 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2044 Invalid, 0 Unknown, 818 Unchecked, 1.0s Time] [2022-03-15 16:16:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-03-15 16:16:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2550. [2022-03-15 16:16:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.3428795606120048) internal successors, (8521), 2549 states have internal predecessors, (8521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8521 transitions. [2022-03-15 16:16:02,698 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8521 transitions. Word has length 24 [2022-03-15 16:16:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:02,698 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 8521 transitions. [2022-03-15 16:16:02,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8521 transitions. [2022-03-15 16:16:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:02,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:02,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:02,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:02,912 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,SelfDestructingSolverStorable229 [2022-03-15 16:16:02,912 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:02,913 INFO L85 PathProgramCache]: Analyzing trace with hash -525329485, now seen corresponding path program 142 times [2022-03-15 16:16:02,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:02,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126558718] [2022-03-15 16:16:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:02,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:03,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:03,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126558718] [2022-03-15 16:16:03,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126558718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:03,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368231829] [2022-03-15 16:16:03,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:16:03,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:03,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:03,183 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:03,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-15 16:16:03,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:16:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:03,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:03,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:03,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:03,419 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 34 treesize of output 20 [2022-03-15 16:16:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:03,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:03,759 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:03,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:16:03,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:03,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:03,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:03,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:03,815 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 20 treesize of output 3 [2022-03-15 16:16:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:03,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368231829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:03,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:03,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:16:03,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105827117] [2022-03-15 16:16:03,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:03,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:16:03,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:03,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:16:03,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:16:03,833 INFO L87 Difference]: Start difference. First operand 2550 states and 8521 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:05,448 INFO L93 Difference]: Finished difference Result 2906 states and 9658 transitions. [2022-03-15 16:16:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:16:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 24 [2022-03-15 16:16:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:05,454 INFO L225 Difference]: With dead ends: 2906 [2022-03-15 16:16:05,454 INFO L226 Difference]: Without dead ends: 2887 [2022-03-15 16:16:05,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:16:05,454 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:05,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 88 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1369 Invalid, 0 Unknown, 230 Unchecked, 0.6s Time] [2022-03-15 16:16:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-03-15 16:16:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2563. [2022-03-15 16:16:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 3.3454332552693207) internal successors, (8571), 2562 states have internal predecessors, (8571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 8571 transitions. [2022-03-15 16:16:05,488 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 8571 transitions. Word has length 24 [2022-03-15 16:16:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:05,488 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 8571 transitions. [2022-03-15 16:16:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 8571 transitions. [2022-03-15 16:16:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:05,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:05,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:05,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-15 16:16:05,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:05,692 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1646928077, now seen corresponding path program 143 times [2022-03-15 16:16:05,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:05,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795561287] [2022-03-15 16:16:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:05,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:05,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795561287] [2022-03-15 16:16:05,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795561287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:05,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979059055] [2022-03-15 16:16:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:16:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:05,979 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:05,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-15 16:16:06,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:16:06,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:16:06,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:06,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:06,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:06,256 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 30 treesize of output 16 [2022-03-15 16:16:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:06,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:06,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:06,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:06,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:06,644 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 20 treesize of output 39 [2022-03-15 16:16:06,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:06,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:06,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:06,665 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 20 treesize of output 3 [2022-03-15 16:16:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:06,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979059055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:06,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:06,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:16:06,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874804809] [2022-03-15 16:16:06,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:06,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:06,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:06,707 INFO L87 Difference]: Start difference. First operand 2563 states and 8571 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:13,854 INFO L93 Difference]: Finished difference Result 3604 states and 11373 transitions. [2022-03-15 16:16:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 16:16:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 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 24 [2022-03-15 16:16:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:13,860 INFO L225 Difference]: With dead ends: 3604 [2022-03-15 16:16:13,860 INFO L226 Difference]: Without dead ends: 3544 [2022-03-15 16:16:13,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4346 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1240, Invalid=12332, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 16:16:13,861 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 467 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:13,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 522 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 6540 Invalid, 0 Unknown, 32 Unchecked, 3.0s Time] [2022-03-15 16:16:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-03-15 16:16:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 2525. [2022-03-15 16:16:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2525 states, 2524 states have (on average 3.340729001584786) internal successors, (8432), 2524 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 8432 transitions. [2022-03-15 16:16:13,898 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 8432 transitions. Word has length 24 [2022-03-15 16:16:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:13,899 INFO L470 AbstractCegarLoop]: Abstraction has 2525 states and 8432 transitions. [2022-03-15 16:16:13,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 8432 transitions. [2022-03-15 16:16:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:13,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:13,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:13,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-15 16:16:14,102 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,SelfDestructingSolverStorable231 [2022-03-15 16:16:14,102 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1367037485, now seen corresponding path program 144 times [2022-03-15 16:16:14,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:14,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319936907] [2022-03-15 16:16:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:14,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:14,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319936907] [2022-03-15 16:16:14,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319936907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:14,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126253715] [2022-03-15 16:16:14,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:16:14,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:14,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:14,396 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:14,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-15 16:16:14,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:16:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:16:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:14,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:14,736 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:16:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:15,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:15,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 57 [2022-03-15 16:16:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:15,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126253715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:15,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:15,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:16:15,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600474301] [2022-03-15 16:16:15,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:15,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:15,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:15,644 INFO L87 Difference]: Start difference. First operand 2525 states and 8432 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:17,871 INFO L93 Difference]: Finished difference Result 3768 states and 12835 transitions. [2022-03-15 16:16:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:16:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:17,878 INFO L225 Difference]: With dead ends: 3768 [2022-03-15 16:16:17,878 INFO L226 Difference]: Without dead ends: 3748 [2022-03-15 16:16:17,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:16:17,879 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:17,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 203 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1634 Invalid, 0 Unknown, 1245 Unchecked, 0.7s Time] [2022-03-15 16:16:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-03-15 16:16:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 2537. [2022-03-15 16:16:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.345031545741325) internal successors, (8483), 2536 states have internal predecessors, (8483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8483 transitions. [2022-03-15 16:16:17,929 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8483 transitions. Word has length 24 [2022-03-15 16:16:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:17,929 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 8483 transitions. [2022-03-15 16:16:17,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8483 transitions. [2022-03-15 16:16:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:17,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:17,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:17,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-15 16:16:18,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-15 16:16:18,133 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1427388839, now seen corresponding path program 145 times [2022-03-15 16:16:18,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:18,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396197389] [2022-03-15 16:16:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:18,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:18,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396197389] [2022-03-15 16:16:18,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396197389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:18,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403601782] [2022-03-15 16:16:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:16:18,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:18,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:18,379 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:18,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-15 16:16:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:18,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:18,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:18,621 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 17 [2022-03-15 16:16:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:18,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:18,949 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:18,949 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 20 treesize of output 43 [2022-03-15 16:16:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:19,004 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 20 treesize of output 3 [2022-03-15 16:16:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:19,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403601782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:19,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:19,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:16:19,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104856626] [2022-03-15 16:16:19,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:19,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:16:19,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:16:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:16:19,022 INFO L87 Difference]: Start difference. First operand 2537 states and 8483 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:19,958 INFO L93 Difference]: Finished difference Result 2868 states and 9604 transitions. [2022-03-15 16:16:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:16:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:19,964 INFO L225 Difference]: With dead ends: 2868 [2022-03-15 16:16:19,964 INFO L226 Difference]: Without dead ends: 2864 [2022-03-15 16:16:19,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:16:19,964 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:19,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 99 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1058 Invalid, 0 Unknown, 218 Unchecked, 0.5s Time] [2022-03-15 16:16:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-03-15 16:16:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2570. [2022-03-15 16:16:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.3588945114830673) internal successors, (8629), 2569 states have internal predecessors, (8629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8629 transitions. [2022-03-15 16:16:19,999 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8629 transitions. Word has length 24 [2022-03-15 16:16:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:19,999 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 8629 transitions. [2022-03-15 16:16:19,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8629 transitions. [2022-03-15 16:16:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:20,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:20,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:20,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-15 16:16:20,203 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,SelfDestructingSolverStorable233 [2022-03-15 16:16:20,203 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1456017990, now seen corresponding path program 24 times [2022-03-15 16:16:20,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:20,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057137519] [2022-03-15 16:16:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:20,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:20,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057137519] [2022-03-15 16:16:20,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057137519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:20,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824687985] [2022-03-15 16:16:20,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:16:20,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:20,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:20,441 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:20,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-15 16:16:20,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:16:20,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:16:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:20,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:20,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:20,721 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:16:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:20,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:21,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:21,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:21,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:21,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 57 [2022-03-15 16:16:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:21,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824687985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:21,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:21,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:16:21,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789095034] [2022-03-15 16:16:21,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:21,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:21,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:21,591 INFO L87 Difference]: Start difference. First operand 2570 states and 8629 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:22,467 INFO L93 Difference]: Finished difference Result 2899 states and 9820 transitions. [2022-03-15 16:16:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:16:22,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 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 24 [2022-03-15 16:16:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:22,473 INFO L225 Difference]: With dead ends: 2899 [2022-03-15 16:16:22,473 INFO L226 Difference]: Without dead ends: 2893 [2022-03-15 16:16:22,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:16:22,473 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:22,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 582 Invalid, 0 Unknown, 310 Unchecked, 0.3s Time] [2022-03-15 16:16:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-03-15 16:16:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2582. [2022-03-15 16:16:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 2581 states have (on average 3.3607129019759783) internal successors, (8674), 2581 states have internal predecessors, (8674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 8674 transitions. [2022-03-15 16:16:22,506 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 8674 transitions. Word has length 24 [2022-03-15 16:16:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:22,506 INFO L470 AbstractCegarLoop]: Abstraction has 2582 states and 8674 transitions. [2022-03-15 16:16:22,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 8674 transitions. [2022-03-15 16:16:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:22,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:22,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:22,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-15 16:16:22,710 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,SelfDestructingSolverStorable234 [2022-03-15 16:16:22,710 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:22,710 INFO L85 PathProgramCache]: Analyzing trace with hash -380065624, now seen corresponding path program 21 times [2022-03-15 16:16:22,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:22,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999417392] [2022-03-15 16:16:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:22,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:22,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999417392] [2022-03-15 16:16:22,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999417392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:22,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268486571] [2022-03-15 16:16:22,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:16:22,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:22,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:22,966 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:22,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-15 16:16:22,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:16:22,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:22,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:23,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:23,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:23,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 61 [2022-03-15 16:16:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:23,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:23,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:23,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:23,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:23,945 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 45 treesize of output 7 [2022-03-15 16:16:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:23,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268486571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:23,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:23,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-15 16:16:23,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370166293] [2022-03-15 16:16:23,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:23,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:23,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:23,976 INFO L87 Difference]: Start difference. First operand 2582 states and 8674 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:27,748 INFO L93 Difference]: Finished difference Result 3767 states and 12249 transitions. [2022-03-15 16:16:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:16:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:27,755 INFO L225 Difference]: With dead ends: 3767 [2022-03-15 16:16:27,755 INFO L226 Difference]: Without dead ends: 3741 [2022-03-15 16:16:27,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:16:27,756 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 319 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1004 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:27,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 177 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2337 Invalid, 0 Unknown, 1004 Unchecked, 1.1s Time] [2022-03-15 16:16:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-03-15 16:16:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 2620. [2022-03-15 16:16:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 3.3680794196258113) internal successors, (8821), 2619 states have internal predecessors, (8821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 8821 transitions. [2022-03-15 16:16:27,794 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 8821 transitions. Word has length 24 [2022-03-15 16:16:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:27,795 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 8821 transitions. [2022-03-15 16:16:27,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 8821 transitions. [2022-03-15 16:16:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:27,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:27,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:27,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-15 16:16:27,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:27,998 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2133522032, now seen corresponding path program 25 times [2022-03-15 16:16:27,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:27,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642666333] [2022-03-15 16:16:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:28,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:28,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642666333] [2022-03-15 16:16:28,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642666333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:28,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801037554] [2022-03-15 16:16:28,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:16:28,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:28,237 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:28,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-15 16:16:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,480 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 37 treesize of output 21 [2022-03-15 16:16:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:28,786 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:28,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:16:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:16:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:28,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801037554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:28,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:28,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-15 16:16:28,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051518786] [2022-03-15 16:16:28,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:28,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:16:28,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:28,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:16:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:16:28,858 INFO L87 Difference]: Start difference. First operand 2620 states and 8821 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:30,260 INFO L93 Difference]: Finished difference Result 3004 states and 10039 transitions. [2022-03-15 16:16:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:16:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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 24 [2022-03-15 16:16:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:30,265 INFO L225 Difference]: With dead ends: 3004 [2022-03-15 16:16:30,265 INFO L226 Difference]: Without dead ends: 2989 [2022-03-15 16:16:30,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:16:30,266 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 161 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:30,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 71 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1278 Invalid, 0 Unknown, 388 Unchecked, 0.6s Time] [2022-03-15 16:16:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-03-15 16:16:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2633. [2022-03-15 16:16:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2632 states have (on average 3.367401215805471) internal successors, (8863), 2632 states have internal predecessors, (8863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 8863 transitions. [2022-03-15 16:16:30,300 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 8863 transitions. Word has length 24 [2022-03-15 16:16:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:30,300 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 8863 transitions. [2022-03-15 16:16:30,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 8863 transitions. [2022-03-15 16:16:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:30,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:30,303 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] [2022-03-15 16:16:30,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-15 16:16:30,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:30,504 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1636225050, now seen corresponding path program 1 times [2022-03-15 16:16:30,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:30,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586945323] [2022-03-15 16:16:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:30,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:30,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586945323] [2022-03-15 16:16:30,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586945323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:30,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026390393] [2022-03-15 16:16:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:30,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:30,712 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:30,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-15 16:16:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:30,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:31,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:31,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:31,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:31,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:31,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:16:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:31,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:31,352 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:31,353 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 20 treesize of output 43 [2022-03-15 16:16:31,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:31,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:31,401 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:16:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:31,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026390393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:31,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:31,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:16:31,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764700848] [2022-03-15 16:16:31,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:31,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:16:31,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:31,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:16:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:16:31,418 INFO L87 Difference]: Start difference. First operand 2633 states and 8863 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:33,112 INFO L93 Difference]: Finished difference Result 3345 states and 11076 transitions. [2022-03-15 16:16:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:16:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:33,119 INFO L225 Difference]: With dead ends: 3345 [2022-03-15 16:16:33,119 INFO L226 Difference]: Without dead ends: 3339 [2022-03-15 16:16:33,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:16:33,119 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 657 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:33,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 206 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1977 Invalid, 0 Unknown, 657 Unchecked, 0.8s Time] [2022-03-15 16:16:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-15 16:16:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2651. [2022-03-15 16:16:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 3.361509433962264) internal successors, (8908), 2650 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 8908 transitions. [2022-03-15 16:16:33,172 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 8908 transitions. Word has length 24 [2022-03-15 16:16:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:33,172 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 8908 transitions. [2022-03-15 16:16:33,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 8908 transitions. [2022-03-15 16:16:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:33,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:33,176 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] [2022-03-15 16:16:33,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:33,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-15 16:16:33,376 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -517823038, now seen corresponding path program 2 times [2022-03-15 16:16:33,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:33,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745581316] [2022-03-15 16:16:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:33,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:33,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:33,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745581316] [2022-03-15 16:16:33,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745581316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:33,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602550058] [2022-03-15 16:16:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:16:33,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:33,585 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:33,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-15 16:16:33,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:16:33,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:33,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:16:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-15 16:16:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:34,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:34,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:16:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:34,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602550058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:34,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:34,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:16:34,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458349215] [2022-03-15 16:16:34,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:34,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:16:34,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:16:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:16:34,660 INFO L87 Difference]: Start difference. First operand 2651 states and 8908 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:36,384 INFO L93 Difference]: Finished difference Result 3376 states and 11002 transitions. [2022-03-15 16:16:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:16:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:16:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:36,390 INFO L225 Difference]: With dead ends: 3376 [2022-03-15 16:16:36,390 INFO L226 Difference]: Without dead ends: 3352 [2022-03-15 16:16:36,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:16:36,391 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 175 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:36,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 332 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1501 Invalid, 0 Unknown, 634 Unchecked, 0.6s Time] [2022-03-15 16:16:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2022-03-15 16:16:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2676. [2022-03-15 16:16:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 3.3517757009345797) internal successors, (8966), 2675 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 8966 transitions. [2022-03-15 16:16:36,429 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 8966 transitions. Word has length 24 [2022-03-15 16:16:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:36,429 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 8966 transitions. [2022-03-15 16:16:36,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 8966 transitions. [2022-03-15 16:16:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:36,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:36,432 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] [2022-03-15 16:16:36,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-15 16:16:36,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-03-15 16:16:36,642 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1782268612, now seen corresponding path program 3 times [2022-03-15 16:16:36,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:36,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866565883] [2022-03-15 16:16:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:36,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:36,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866565883] [2022-03-15 16:16:36,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866565883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:36,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914869096] [2022-03-15 16:16:36,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:16:36,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:36,862 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:36,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-15 16:16:36,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:16:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:16:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:37,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:37,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:37,250 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:16:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:37,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:37,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:37,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:37,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:16:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:38,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914869096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:38,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:38,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-15 16:16:38,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310739817] [2022-03-15 16:16:38,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:38,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:38,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:38,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:38,045 INFO L87 Difference]: Start difference. First operand 2676 states and 8966 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:40,805 INFO L93 Difference]: Finished difference Result 4696 states and 15925 transitions. [2022-03-15 16:16:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:16:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:16:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:40,815 INFO L225 Difference]: With dead ends: 4696 [2022-03-15 16:16:40,815 INFO L226 Difference]: Without dead ends: 4691 [2022-03-15 16:16:40,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=561, Invalid=4841, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:16:40,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2078 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:40,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 228 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 859 Invalid, 0 Unknown, 2078 Unchecked, 0.4s Time] [2022-03-15 16:16:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-03-15 16:16:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2706. [2022-03-15 16:16:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2705 states have (on average 3.343438077634011) internal successors, (9044), 2705 states have internal predecessors, (9044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 9044 transitions. [2022-03-15 16:16:40,881 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 9044 transitions. Word has length 24 [2022-03-15 16:16:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:40,882 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 9044 transitions. [2022-03-15 16:16:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 9044 transitions. [2022-03-15 16:16:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:40,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:40,885 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] [2022-03-15 16:16:40,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-15 16:16:41,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:41,086 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash 857387454, now seen corresponding path program 4 times [2022-03-15 16:16:41,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:41,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263863670] [2022-03-15 16:16:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:41,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:41,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:41,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263863670] [2022-03-15 16:16:41,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263863670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:41,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446388350] [2022-03-15 16:16:41,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:16:41,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:41,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:41,293 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:41,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-15 16:16:41,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:16:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:41,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:41,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:41,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:41,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:41,595 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 17 [2022-03-15 16:16:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:41,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:41,897 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:41,897 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 20 treesize of output 43 [2022-03-15 16:16:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:41,953 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 20 treesize of output 3 [2022-03-15 16:16:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:41,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446388350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:41,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:41,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:16:41,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870451007] [2022-03-15 16:16:41,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:41,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:16:41,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:16:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:16:41,971 INFO L87 Difference]: Start difference. First operand 2706 states and 9044 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:43,207 INFO L93 Difference]: Finished difference Result 3335 states and 10880 transitions. [2022-03-15 16:16:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:16:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:43,214 INFO L225 Difference]: With dead ends: 3335 [2022-03-15 16:16:43,214 INFO L226 Difference]: Without dead ends: 3331 [2022-03-15 16:16:43,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:16:43,214 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:43,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 258 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1552 Invalid, 0 Unknown, 597 Unchecked, 0.6s Time] [2022-03-15 16:16:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-03-15 16:16:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 2695. [2022-03-15 16:16:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.3496659242761693) internal successors, (9024), 2694 states have internal predecessors, (9024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9024 transitions. [2022-03-15 16:16:43,254 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9024 transitions. Word has length 24 [2022-03-15 16:16:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:43,254 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9024 transitions. [2022-03-15 16:16:43,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9024 transitions. [2022-03-15 16:16:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:43,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:43,258 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] [2022-03-15 16:16:43,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-15 16:16:43,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:43,458 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash -735920548, now seen corresponding path program 5 times [2022-03-15 16:16:43,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:43,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015554553] [2022-03-15 16:16:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:43,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:43,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:43,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015554553] [2022-03-15 16:16:43,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015554553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:43,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760794966] [2022-03-15 16:16:43,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:16:43,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:43,672 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:43,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-15 16:16:43,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:16:43,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:43,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:43,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:43,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:43,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:43,995 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 37 treesize of output 21 [2022-03-15 16:16:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:44,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:44,301 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:44,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:16:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:44,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:44,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:44,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:16:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:44,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760794966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:44,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:44,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:16:44,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962048470] [2022-03-15 16:16:44,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:44,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:16:44,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:44,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:16:44,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:16:44,374 INFO L87 Difference]: Start difference. First operand 2695 states and 9024 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:46,012 INFO L93 Difference]: Finished difference Result 3440 states and 11288 transitions. [2022-03-15 16:16:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:16:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:46,018 INFO L225 Difference]: With dead ends: 3440 [2022-03-15 16:16:46,018 INFO L226 Difference]: Without dead ends: 3435 [2022-03-15 16:16:46,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:16:46,019 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 192 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:46,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 209 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1977 Invalid, 0 Unknown, 524 Unchecked, 0.8s Time] [2022-03-15 16:16:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-03-15 16:16:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2700. [2022-03-15 16:16:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.347906632085958) internal successors, (9036), 2699 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9036 transitions. [2022-03-15 16:16:46,057 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9036 transitions. Word has length 24 [2022-03-15 16:16:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:46,058 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9036 transitions. [2022-03-15 16:16:46,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9036 transitions. [2022-03-15 16:16:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:46,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:46,061 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] [2022-03-15 16:16:46,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-15 16:16:46,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:46,262 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash -922618564, now seen corresponding path program 6 times [2022-03-15 16:16:46,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:46,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268678096] [2022-03-15 16:16:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:46,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:46,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268678096] [2022-03-15 16:16:46,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268678096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:46,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225573565] [2022-03-15 16:16:46,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:16:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:46,468 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:46,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-15 16:16:46,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:16:46,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:46,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:46,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 51 [2022-03-15 16:16:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:46,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:47,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:47,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:47,488 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-03-15 16:16:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:47,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225573565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:47,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:47,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:16:47,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202714115] [2022-03-15 16:16:47,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:16:47,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:16:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:16:47,519 INFO L87 Difference]: Start difference. First operand 2700 states and 9036 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:51,860 INFO L93 Difference]: Finished difference Result 4885 states and 16240 transitions. [2022-03-15 16:16:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:16:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:16:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:51,887 INFO L225 Difference]: With dead ends: 4885 [2022-03-15 16:16:51,887 INFO L226 Difference]: Without dead ends: 4875 [2022-03-15 16:16:51,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=948, Invalid=9354, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 16:16:51,888 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 228 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1290 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:51,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 285 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2170 Invalid, 0 Unknown, 1290 Unchecked, 1.0s Time] [2022-03-15 16:16:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-15 16:16:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 2715. [2022-03-15 16:16:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.347457627118644) internal successors, (9085), 2714 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 9085 transitions. [2022-03-15 16:16:51,938 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 9085 transitions. Word has length 24 [2022-03-15 16:16:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 9085 transitions. [2022-03-15 16:16:51,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 9085 transitions. [2022-03-15 16:16:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:51,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:51,942 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] [2022-03-15 16:16:51,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-15 16:16:52,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:52,143 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1717037502, now seen corresponding path program 7 times [2022-03-15 16:16:52,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:52,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324206307] [2022-03-15 16:16:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:52,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:52,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324206307] [2022-03-15 16:16:52,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324206307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:52,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962843761] [2022-03-15 16:16:52,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:16:52,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:52,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:52,346 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:52,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-15 16:16:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:52,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:52,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:52,639 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 17 [2022-03-15 16:16:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:52,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:52,918 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:16:52,918 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:16:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:52,991 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 20 treesize of output 3 [2022-03-15 16:16:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:53,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962843761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:53,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:53,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:16:53,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544073065] [2022-03-15 16:16:53,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:53,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:16:53,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:53,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:16:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:16:53,008 INFO L87 Difference]: Start difference. First operand 2715 states and 9085 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:54,604 INFO L93 Difference]: Finished difference Result 4179 states and 13864 transitions. [2022-03-15 16:16:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:16:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:54,613 INFO L225 Difference]: With dead ends: 4179 [2022-03-15 16:16:54,613 INFO L226 Difference]: Without dead ends: 4173 [2022-03-15 16:16:54,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=319, Invalid=2761, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:16:54,614 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:54,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 231 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1586 Invalid, 0 Unknown, 497 Unchecked, 0.7s Time] [2022-03-15 16:16:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-03-15 16:16:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 2710. [2022-03-15 16:16:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 3.349575489110373) internal successors, (9074), 2709 states have internal predecessors, (9074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 9074 transitions. [2022-03-15 16:16:54,673 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 9074 transitions. Word has length 24 [2022-03-15 16:16:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 9074 transitions. [2022-03-15 16:16:54,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 9074 transitions. [2022-03-15 16:16:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:54,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:54,677 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] [2022-03-15 16:16:54,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-15 16:16:54,877 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,SelfDestructingSolverStorable243 [2022-03-15 16:16:54,877 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash -348066496, now seen corresponding path program 8 times [2022-03-15 16:16:54,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:54,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961052082] [2022-03-15 16:16:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:54,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:55,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:55,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961052082] [2022-03-15 16:16:55,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961052082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:55,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639324682] [2022-03-15 16:16:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:16:55,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:55,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:55,094 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:55,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-15 16:16:55,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:16:55,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:55,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:16:55,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:55,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:55,486 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 39 treesize of output 51 [2022-03-15 16:16:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:55,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:56,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:56,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:56,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:56,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2022-03-15 16:16:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:56,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639324682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:56,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:56,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:16:56,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314377552] [2022-03-15 16:16:56,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:56,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:56,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:56,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:56,203 INFO L87 Difference]: Start difference. First operand 2710 states and 9074 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:58,200 INFO L93 Difference]: Finished difference Result 3515 states and 11562 transitions. [2022-03-15 16:16:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:16:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:16:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:58,207 INFO L225 Difference]: With dead ends: 3515 [2022-03-15 16:16:58,207 INFO L226 Difference]: Without dead ends: 3510 [2022-03-15 16:16:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=347, Invalid=3313, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:16:58,207 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 226 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1932 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:58,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 274 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1635 Invalid, 0 Unknown, 1932 Unchecked, 0.7s Time] [2022-03-15 16:16:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-03-15 16:16:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2686. [2022-03-15 16:16:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 3.3579143389199255) internal successors, (9016), 2685 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 9016 transitions. [2022-03-15 16:16:58,247 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 9016 transitions. Word has length 24 [2022-03-15 16:16:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 9016 transitions. [2022-03-15 16:16:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 9016 transitions. [2022-03-15 16:16:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:16:58,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:58,251 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] [2022-03-15 16:16:58,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-03-15 16:16:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:58,451 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:16:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash 704223460, now seen corresponding path program 9 times [2022-03-15 16:16:58,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:58,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021141013] [2022-03-15 16:16:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:58,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:58,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021141013] [2022-03-15 16:16:58,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021141013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:58,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839240880] [2022-03-15 16:16:58,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:16:58,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:58,671 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:58,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-15 16:16:58,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:16:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:58,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:16:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:59,043 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:16:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:59,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:59,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:16:59,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:16:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:59,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839240880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:59,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:59,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-15 16:16:59,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771150899] [2022-03-15 16:16:59,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:59,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:16:59,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:16:59,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:16:59,924 INFO L87 Difference]: Start difference. First operand 2686 states and 9016 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:01,101 INFO L93 Difference]: Finished difference Result 3703 states and 12695 transitions. [2022-03-15 16:17:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:17:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:17:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:01,109 INFO L225 Difference]: With dead ends: 3703 [2022-03-15 16:17:01,109 INFO L226 Difference]: Without dead ends: 3701 [2022-03-15 16:17:01,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:17:01,110 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:01,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 173 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 558 Unchecked, 0.1s Time] [2022-03-15 16:17:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2022-03-15 16:17:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2691. [2022-03-15 16:17:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 3.3557620817843867) internal successors, (9027), 2690 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 9027 transitions. [2022-03-15 16:17:01,153 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 9027 transitions. Word has length 24 [2022-03-15 16:17:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:01,153 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 9027 transitions. [2022-03-15 16:17:01,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 9027 transitions. [2022-03-15 16:17:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:01,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:01,157 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] [2022-03-15 16:17:01,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-15 16:17:01,358 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,SelfDestructingSolverStorable245 [2022-03-15 16:17:01,358 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -560222114, now seen corresponding path program 10 times [2022-03-15 16:17:01,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:01,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517818510] [2022-03-15 16:17:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:01,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:01,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517818510] [2022-03-15 16:17:01,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517818510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:01,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291725961] [2022-03-15 16:17:01,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:01,580 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:01,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-15 16:17:01,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:01,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:01,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:01,937 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 17 [2022-03-15 16:17:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:01,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:02,245 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:02,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:17:02,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:02,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:02,300 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 20 treesize of output 3 [2022-03-15 16:17:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:02,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291725961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:02,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:02,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:17:02,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902479575] [2022-03-15 16:17:02,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:02,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:17:02,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:02,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:17:02,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:17:02,318 INFO L87 Difference]: Start difference. First operand 2691 states and 9027 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:03,765 INFO L93 Difference]: Finished difference Result 3064 states and 10166 transitions. [2022-03-15 16:17:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:17:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:03,771 INFO L225 Difference]: With dead ends: 3064 [2022-03-15 16:17:03,771 INFO L226 Difference]: Without dead ends: 3058 [2022-03-15 16:17:03,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:17:03,771 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:03,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 162 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1805 Invalid, 0 Unknown, 279 Unchecked, 0.7s Time] [2022-03-15 16:17:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-03-15 16:17:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2695. [2022-03-15 16:17:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.35449146250928) internal successors, (9037), 2694 states have internal predecessors, (9037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9037 transitions. [2022-03-15 16:17:03,806 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9037 transitions. Word has length 24 [2022-03-15 16:17:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:03,806 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9037 transitions. [2022-03-15 16:17:03,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9037 transitions. [2022-03-15 16:17:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:03,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:03,810 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] [2022-03-15 16:17:03,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-03-15 16:17:04,010 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,SelfDestructingSolverStorable246 [2022-03-15 16:17:04,011 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1092727899, now seen corresponding path program 1 times [2022-03-15 16:17:04,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:04,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674633197] [2022-03-15 16:17:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:04,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:04,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:04,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674633197] [2022-03-15 16:17:04,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674633197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:04,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977812533] [2022-03-15 16:17:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:04,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:04,225 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:04,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-15 16:17:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,546 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 37 treesize of output 21 [2022-03-15 16:17:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:04,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:04,866 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:04,866 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 20 treesize of output 43 [2022-03-15 16:17:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,921 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 20 treesize of output 3 [2022-03-15 16:17:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:04,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977812533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:04,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:04,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:17:04,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230501965] [2022-03-15 16:17:04,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:04,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:17:04,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:04,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:17:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:17:04,938 INFO L87 Difference]: Start difference. First operand 2695 states and 9037 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:06,394 INFO L93 Difference]: Finished difference Result 3168 states and 10462 transitions. [2022-03-15 16:17:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:17:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:06,416 INFO L225 Difference]: With dead ends: 3168 [2022-03-15 16:17:06,416 INFO L226 Difference]: Without dead ends: 3162 [2022-03-15 16:17:06,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:17:06,416 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1193 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:06,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 173 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1700 Invalid, 0 Unknown, 1193 Unchecked, 0.7s Time] [2022-03-15 16:17:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-03-15 16:17:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2692. [2022-03-15 16:17:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 3.3552582683017467) internal successors, (9029), 2691 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 9029 transitions. [2022-03-15 16:17:06,451 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 9029 transitions. Word has length 24 [2022-03-15 16:17:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:06,452 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 9029 transitions. [2022-03-15 16:17:06,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 9029 transitions. [2022-03-15 16:17:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:06,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:06,455 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] [2022-03-15 16:17:06,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-15 16:17:06,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-03-15 16:17:06,656 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash 161966204, now seen corresponding path program 11 times [2022-03-15 16:17:06,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:06,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814006799] [2022-03-15 16:17:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:06,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:06,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814006799] [2022-03-15 16:17:06,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814006799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:06,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919777099] [2022-03-15 16:17:06,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:06,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:06,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:06,894 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:06,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-15 16:17:06,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:17:06,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:07,209 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 37 treesize of output 21 [2022-03-15 16:17:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:07,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:07,483 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:07,483 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 20 treesize of output 43 [2022-03-15 16:17:07,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:07,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:07,537 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 20 treesize of output 3 [2022-03-15 16:17:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:07,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919777099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:07,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:07,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:17:07,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044611143] [2022-03-15 16:17:07,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:07,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:17:07,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:17:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:17:07,555 INFO L87 Difference]: Start difference. First operand 2692 states and 9029 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:08,503 INFO L93 Difference]: Finished difference Result 3042 states and 10151 transitions. [2022-03-15 16:17:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:17:08,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:08,509 INFO L225 Difference]: With dead ends: 3042 [2022-03-15 16:17:08,509 INFO L226 Difference]: Without dead ends: 3036 [2022-03-15 16:17:08,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:17:08,510 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:08,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 159 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1320 Invalid, 0 Unknown, 513 Unchecked, 0.6s Time] [2022-03-15 16:17:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-03-15 16:17:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2695. [2022-03-15 16:17:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 3.3537490720118783) internal successors, (9035), 2694 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9035 transitions. [2022-03-15 16:17:08,546 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9035 transitions. Word has length 24 [2022-03-15 16:17:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:08,547 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9035 transitions. [2022-03-15 16:17:08,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9035 transitions. [2022-03-15 16:17:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:08,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:08,550 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] [2022-03-15 16:17:08,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-15 16:17:08,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:08,751 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1493345026, now seen corresponding path program 12 times [2022-03-15 16:17:08,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:08,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256848997] [2022-03-15 16:17:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:08,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:08,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:08,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256848997] [2022-03-15 16:17:08,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256848997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:08,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672524736] [2022-03-15 16:17:08,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:08,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:08,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:08,990 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:08,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-15 16:17:09,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:17:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:09,389 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 35 treesize of output 47 [2022-03-15 16:17:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:09,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:10,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:10,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:10,030 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 45 treesize of output 7 [2022-03-15 16:17:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:10,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672524736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:10,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:10,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:17:10,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111853735] [2022-03-15 16:17:10,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:10,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:17:10,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:17:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:17:10,062 INFO L87 Difference]: Start difference. First operand 2695 states and 9035 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:11,613 INFO L93 Difference]: Finished difference Result 3280 states and 10877 transitions. [2022-03-15 16:17:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:17:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:17:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:11,620 INFO L225 Difference]: With dead ends: 3280 [2022-03-15 16:17:11,620 INFO L226 Difference]: Without dead ends: 3272 [2022-03-15 16:17:11,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=3194, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:17:11,621 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:11,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 193 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 910 Invalid, 0 Unknown, 728 Unchecked, 0.4s Time] [2022-03-15 16:17:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-03-15 16:17:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2700. [2022-03-15 16:17:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 3.3519822156354206) internal successors, (9047), 2699 states have internal predecessors, (9047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9047 transitions. [2022-03-15 16:17:11,659 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9047 transitions. Word has length 24 [2022-03-15 16:17:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:11,660 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9047 transitions. [2022-03-15 16:17:11,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9047 transitions. [2022-03-15 16:17:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:11,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:11,665 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] [2022-03-15 16:17:11,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:11,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:11,879 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2106276388, now seen corresponding path program 13 times [2022-03-15 16:17:11,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:11,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058087677] [2022-03-15 16:17:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:12,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:12,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058087677] [2022-03-15 16:17:12,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058087677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:12,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521248511] [2022-03-15 16:17:12,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:12,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:12,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:12,129 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:12,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-15 16:17:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:12,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:12,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:12,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:17:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:12,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:12,710 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:12,710 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 20 treesize of output 43 [2022-03-15 16:17:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:12,757 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 20 treesize of output 3 [2022-03-15 16:17:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:12,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521248511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:12,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:12,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:17:12,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448275144] [2022-03-15 16:17:12,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:12,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:17:12,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:17:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:17:12,774 INFO L87 Difference]: Start difference. First operand 2700 states and 9047 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:13,512 INFO L93 Difference]: Finished difference Result 3046 states and 10128 transitions. [2022-03-15 16:17:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:17:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:13,531 INFO L225 Difference]: With dead ends: 3046 [2022-03-15 16:17:13,531 INFO L226 Difference]: Without dead ends: 3040 [2022-03-15 16:17:13,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:17:13,532 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:13,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 173 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 997 Invalid, 0 Unknown, 619 Unchecked, 0.4s Time] [2022-03-15 16:17:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-03-15 16:17:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2711. [2022-03-15 16:17:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 3.347970479704797) internal successors, (9073), 2710 states have internal predecessors, (9073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 9073 transitions. [2022-03-15 16:17:13,564 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 9073 transitions. Word has length 24 [2022-03-15 16:17:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:13,564 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 9073 transitions. [2022-03-15 16:17:13,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 9073 transitions. [2022-03-15 16:17:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:13,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:13,567 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] [2022-03-15 16:17:13,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:13,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:13,768 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1245023274, now seen corresponding path program 14 times [2022-03-15 16:17:13,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:13,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039163567] [2022-03-15 16:17:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:14,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:14,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039163567] [2022-03-15 16:17:14,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039163567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:14,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208236357] [2022-03-15 16:17:14,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:14,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:14,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:14,003 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:14,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-15 16:17:14,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:17:14,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:14,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:14,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:14,335 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:17:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:14,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:15,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:15,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:15,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:15,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:17:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:15,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208236357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:15,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:15,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:17:15,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187900177] [2022-03-15 16:17:15,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:15,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:17:15,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:17:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:17:15,113 INFO L87 Difference]: Start difference. First operand 2711 states and 9073 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:16,570 INFO L93 Difference]: Finished difference Result 3799 states and 13030 transitions. [2022-03-15 16:17:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:17:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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 24 [2022-03-15 16:17:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:16,577 INFO L225 Difference]: With dead ends: 3799 [2022-03-15 16:17:16,577 INFO L226 Difference]: Without dead ends: 3794 [2022-03-15 16:17:16,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:17:16,578 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:16,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 146 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 471 Invalid, 0 Unknown, 1051 Unchecked, 0.2s Time] [2022-03-15 16:17:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-03-15 16:17:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2716. [2022-03-15 16:17:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 3.347329650092081) internal successors, (9088), 2715 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 9088 transitions. [2022-03-15 16:17:16,623 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 9088 transitions. Word has length 24 [2022-03-15 16:17:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:16,623 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 9088 transitions. [2022-03-15 16:17:16,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 9088 transitions. [2022-03-15 16:17:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:16,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:16,627 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] [2022-03-15 16:17:16,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-15 16:17:16,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:16,828 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:16,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1242489559, now seen corresponding path program 2 times [2022-03-15 16:17:16,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:16,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89981460] [2022-03-15 16:17:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:17,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89981460] [2022-03-15 16:17:17,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89981460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:17,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346994808] [2022-03-15 16:17:17,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:17,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:17,064 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:17,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-15 16:17:17,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:17:17,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:17,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:17,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:17,397 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:17:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:18,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:18,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:18,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:18,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:17:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346994808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:18,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:18,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:17:18,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902556373] [2022-03-15 16:17:18,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:18,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:17:18,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:17:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:17:18,181 INFO L87 Difference]: Start difference. First operand 2716 states and 9088 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:19,184 INFO L93 Difference]: Finished difference Result 3740 states and 12792 transitions. [2022-03-15 16:17:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:17:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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 24 [2022-03-15 16:17:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:19,191 INFO L225 Difference]: With dead ends: 3740 [2022-03-15 16:17:19,191 INFO L226 Difference]: Without dead ends: 3735 [2022-03-15 16:17:19,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:17:19,191 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 805 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:19,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 462 Invalid, 0 Unknown, 805 Unchecked, 0.2s Time] [2022-03-15 16:17:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-03-15 16:17:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2724. [2022-03-15 16:17:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.345207491737055) internal successors, (9109), 2723 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-03-15 16:17:19,228 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-03-15 16:17:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:19,228 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-03-15 16:17:19,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-03-15 16:17:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:19,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:19,232 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] [2022-03-15 16:17:19,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-15 16:17:19,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:19,432 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2037251490, now seen corresponding path program 15 times [2022-03-15 16:17:19,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:19,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329512105] [2022-03-15 16:17:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:19,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:19,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:19,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329512105] [2022-03-15 16:17:19,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329512105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:19,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226812259] [2022-03-15 16:17:19,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:19,744 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:19,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-15 16:17:19,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:17:19,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:17:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:20,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 21 [2022-03-15 16:17:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:20,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:20,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:17:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:20,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226812259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:20,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:20,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:17:20,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053286739] [2022-03-15 16:17:20,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:20,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:17:20,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:17:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:17:20,725 INFO L87 Difference]: Start difference. First operand 2724 states and 9109 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:21,712 INFO L93 Difference]: Finished difference Result 3059 states and 10170 transitions. [2022-03-15 16:17:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:17:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 24 [2022-03-15 16:17:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:21,718 INFO L225 Difference]: With dead ends: 3059 [2022-03-15 16:17:21,718 INFO L226 Difference]: Without dead ends: 3057 [2022-03-15 16:17:21,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:17:21,718 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:21,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 134 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 953 Invalid, 0 Unknown, 363 Unchecked, 0.4s Time] [2022-03-15 16:17:21,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-03-15 16:17:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2724. [2022-03-15 16:17:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.345207491737055) internal successors, (9109), 2723 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-03-15 16:17:21,766 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-03-15 16:17:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:21,766 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-03-15 16:17:21,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-03-15 16:17:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:21,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:21,770 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] [2022-03-15 16:17:21,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-15 16:17:21,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:21,971 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash 229797027, now seen corresponding path program 3 times [2022-03-15 16:17:21,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:21,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910188637] [2022-03-15 16:17:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:22,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:22,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910188637] [2022-03-15 16:17:22,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910188637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:22,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636359912] [2022-03-15 16:17:22,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:22,227 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:22,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-15 16:17:22,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:17:22,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:22,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:17:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:22,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:22,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 21 [2022-03-15 16:17:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:22,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:23,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:23,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:23,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:17:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:23,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636359912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:23,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:23,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:17:23,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700474122] [2022-03-15 16:17:23,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:23,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:17:23,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:17:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:17:23,218 INFO L87 Difference]: Start difference. First operand 2724 states and 9109 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:24,526 INFO L93 Difference]: Finished difference Result 3203 states and 10673 transitions. [2022-03-15 16:17:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:17:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 24 [2022-03-15 16:17:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:24,533 INFO L225 Difference]: With dead ends: 3203 [2022-03-15 16:17:24,533 INFO L226 Difference]: Without dead ends: 3198 [2022-03-15 16:17:24,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:17:24,534 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:24,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 160 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1275 Invalid, 0 Unknown, 745 Unchecked, 0.6s Time] [2022-03-15 16:17:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-03-15 16:17:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2721. [2022-03-15 16:17:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 3.3459558823529414) internal successors, (9101), 2720 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9101 transitions. [2022-03-15 16:17:24,584 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9101 transitions. Word has length 24 [2022-03-15 16:17:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:24,584 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 9101 transitions. [2022-03-15 16:17:24,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9101 transitions. [2022-03-15 16:17:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:24,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:24,589 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] [2022-03-15 16:17:24,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-03-15 16:17:24,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:24,792 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 290200096, now seen corresponding path program 16 times [2022-03-15 16:17:24,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:24,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674861832] [2022-03-15 16:17:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:25,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:25,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674861832] [2022-03-15 16:17:25,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674861832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:25,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725290055] [2022-03-15 16:17:25,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:25,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:25,052 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:25,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-15 16:17:25,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:25,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:25,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:25,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:17:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:25,623 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:25,624 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 20 treesize of output 43 [2022-03-15 16:17:25,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:25,670 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 20 treesize of output 3 [2022-03-15 16:17:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:25,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725290055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:25,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:25,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:17:25,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914596396] [2022-03-15 16:17:25,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:25,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:17:25,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:25,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:17:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:17:25,690 INFO L87 Difference]: Start difference. First operand 2721 states and 9101 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:26,779 INFO L93 Difference]: Finished difference Result 3085 states and 10266 transitions. [2022-03-15 16:17:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:17:26,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:26,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:26,787 INFO L225 Difference]: With dead ends: 3085 [2022-03-15 16:17:26,788 INFO L226 Difference]: Without dead ends: 3079 [2022-03-15 16:17:26,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:17:26,788 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:26,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 151 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1267 Invalid, 0 Unknown, 233 Unchecked, 0.5s Time] [2022-03-15 16:17:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-03-15 16:17:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2722. [2022-03-15 16:17:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 3.3454612274898934) internal successors, (9103), 2721 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-03-15 16:17:26,833 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-03-15 16:17:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:26,834 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-03-15 16:17:26,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-03-15 16:17:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:26,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:26,838 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] [2022-03-15 16:17:26,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:27,040 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,SelfDestructingSolverStorable255 [2022-03-15 16:17:27,040 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1596395592, now seen corresponding path program 17 times [2022-03-15 16:17:27,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:27,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535177898] [2022-03-15 16:17:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:27,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:27,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535177898] [2022-03-15 16:17:27,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535177898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:27,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620977983] [2022-03-15 16:17:27,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:27,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:27,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:27,302 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-15 16:17:27,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:17:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:27,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:17:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:27,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:27,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:27,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-15 16:17:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:27,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:28,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:28,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:28,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:17:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:28,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620977983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:28,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:28,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:17:28,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970689888] [2022-03-15 16:17:28,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:28,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:17:28,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:17:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:17:28,295 INFO L87 Difference]: Start difference. First operand 2722 states and 9103 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:29,209 INFO L93 Difference]: Finished difference Result 2948 states and 9837 transitions. [2022-03-15 16:17:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:17:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 24 [2022-03-15 16:17:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:29,214 INFO L225 Difference]: With dead ends: 2948 [2022-03-15 16:17:29,215 INFO L226 Difference]: Without dead ends: 2942 [2022-03-15 16:17:29,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:17:29,215 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:29,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 128 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1382 Invalid, 0 Unknown, 329 Unchecked, 0.6s Time] [2022-03-15 16:17:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-03-15 16:17:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2724. [2022-03-15 16:17:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 3.3444730077120823) internal successors, (9107), 2723 states have internal predecessors, (9107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9107 transitions. [2022-03-15 16:17:29,248 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9107 transitions. Word has length 24 [2022-03-15 16:17:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:29,248 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9107 transitions. [2022-03-15 16:17:29,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9107 transitions. [2022-03-15 16:17:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:29,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:29,251 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] [2022-03-15 16:17:29,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-15 16:17:29,452 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,SelfDestructingSolverStorable256 [2022-03-15 16:17:29,452 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash -528106916, now seen corresponding path program 18 times [2022-03-15 16:17:29,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:29,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989958364] [2022-03-15 16:17:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:29,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:29,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989958364] [2022-03-15 16:17:29,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989958364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:29,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457317015] [2022-03-15 16:17:29,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:29,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:29,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:29,699 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:29,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-15 16:17:29,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:17:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:17:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:30,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:30,087 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 28 treesize of output 42 [2022-03-15 16:17:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:31,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:31,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:31,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-03-15 16:17:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:31,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457317015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:31,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:31,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:17:31,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559559790] [2022-03-15 16:17:31,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:31,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:17:31,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:17:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:17:31,154 INFO L87 Difference]: Start difference. First operand 2724 states and 9107 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:32,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:32,141 INFO L93 Difference]: Finished difference Result 2971 states and 9838 transitions. [2022-03-15 16:17:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:17:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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 24 [2022-03-15 16:17:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:32,147 INFO L225 Difference]: With dead ends: 2971 [2022-03-15 16:17:32,147 INFO L226 Difference]: Without dead ends: 2965 [2022-03-15 16:17:32,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:17:32,147 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:32,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 128 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1066 Invalid, 0 Unknown, 263 Unchecked, 0.5s Time] [2022-03-15 16:17:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-03-15 16:17:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2725. [2022-03-15 16:17:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.3443465491923643) internal successors, (9110), 2724 states have internal predecessors, (9110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 9110 transitions. [2022-03-15 16:17:32,183 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 9110 transitions. Word has length 24 [2022-03-15 16:17:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:32,183 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 9110 transitions. [2022-03-15 16:17:32,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 9110 transitions. [2022-03-15 16:17:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:32,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:32,187 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] [2022-03-15 16:17:32,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-03-15 16:17:32,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-15 16:17:32,387 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash 205459606, now seen corresponding path program 19 times [2022-03-15 16:17:32,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:32,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965419794] [2022-03-15 16:17:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:32,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:32,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:32,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965419794] [2022-03-15 16:17:32,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965419794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:32,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221992036] [2022-03-15 16:17:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:32,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:32,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:32,638 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:32,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-15 16:17:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:32,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:32,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-03-15 16:17:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:32,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:33,231 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:33,231 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 20 treesize of output 43 [2022-03-15 16:17:33,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:33,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:33,272 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 20 treesize of output 3 [2022-03-15 16:17:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:33,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221992036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:33,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:33,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-03-15 16:17:33,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327260721] [2022-03-15 16:17:33,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:33,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:17:33,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:17:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:17:33,289 INFO L87 Difference]: Start difference. First operand 2725 states and 9110 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:34,050 INFO L93 Difference]: Finished difference Result 3010 states and 10068 transitions. [2022-03-15 16:17:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:17:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 24 [2022-03-15 16:17:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:34,055 INFO L225 Difference]: With dead ends: 3010 [2022-03-15 16:17:34,055 INFO L226 Difference]: Without dead ends: 3003 [2022-03-15 16:17:34,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:17:34,055 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:34,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 78 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 979 Invalid, 0 Unknown, 446 Unchecked, 0.4s Time] [2022-03-15 16:17:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-03-15 16:17:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2722. [2022-03-15 16:17:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 3.3454612274898934) internal successors, (9103), 2721 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-03-15 16:17:34,100 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-03-15 16:17:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:34,100 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-03-15 16:17:34,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-03-15 16:17:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:34,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:34,104 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] [2022-03-15 16:17:34,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:34,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:34,304 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1151190437, now seen corresponding path program 1 times [2022-03-15 16:17:34,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:34,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884876831] [2022-03-15 16:17:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:34,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:34,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:34,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884876831] [2022-03-15 16:17:34,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884876831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:34,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937909815] [2022-03-15 16:17:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:34,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:34,510 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:34,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-15 16:17:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:34,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:34,808 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 37 treesize of output 21 [2022-03-15 16:17:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:34,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:35,111 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:35,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:17:35,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:35,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:35,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:17:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:35,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937909815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:35,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:35,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:17:35,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367102384] [2022-03-15 16:17:35,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:35,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:17:35,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:17:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:17:35,179 INFO L87 Difference]: Start difference. First operand 2722 states and 9103 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:36,877 INFO L93 Difference]: Finished difference Result 3685 states and 12161 transitions. [2022-03-15 16:17:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:17:36,877 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:36,884 INFO L225 Difference]: With dead ends: 3685 [2022-03-15 16:17:36,885 INFO L226 Difference]: Without dead ends: 3677 [2022-03-15 16:17:36,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:17:36,885 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:36,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 222 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1821 Invalid, 0 Unknown, 867 Unchecked, 0.8s Time] [2022-03-15 16:17:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2022-03-15 16:17:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2742. [2022-03-15 16:17:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2741 states have (on average 3.3363735862823787) internal successors, (9145), 2741 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 9145 transitions. [2022-03-15 16:17:36,931 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 9145 transitions. Word has length 24 [2022-03-15 16:17:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:36,932 INFO L470 AbstractCegarLoop]: Abstraction has 2742 states and 9145 transitions. [2022-03-15 16:17:36,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 9145 transitions. [2022-03-15 16:17:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:36,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:36,946 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] [2022-03-15 16:17:36,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-15 16:17:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-15 16:17:37,146 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash -274716803, now seen corresponding path program 2 times [2022-03-15 16:17:37,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:37,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968871466] [2022-03-15 16:17:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:37,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:37,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968871466] [2022-03-15 16:17:37,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968871466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:37,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358684502] [2022-03-15 16:17:37,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:37,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:37,354 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:37,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-15 16:17:37,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:37,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:37,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:37,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:37,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:37,726 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 35 treesize of output 47 [2022-03-15 16:17:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:38,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:38,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:38,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:38,408 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 45 treesize of output 7 [2022-03-15 16:17:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:38,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358684502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:38,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:38,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:17:38,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455337805] [2022-03-15 16:17:38,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:38,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:17:38,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:17:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:17:38,439 INFO L87 Difference]: Start difference. First operand 2742 states and 9145 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:40,690 INFO L93 Difference]: Finished difference Result 3536 states and 11657 transitions. [2022-03-15 16:17:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:17:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:40,697 INFO L225 Difference]: With dead ends: 3536 [2022-03-15 16:17:40,697 INFO L226 Difference]: Without dead ends: 3530 [2022-03-15 16:17:40,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=436, Invalid=3986, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:17:40,698 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1214 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:40,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 228 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1453 Invalid, 0 Unknown, 1214 Unchecked, 0.6s Time] [2022-03-15 16:17:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-03-15 16:17:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2744. [2022-03-15 16:17:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 3.3357637623040466) internal successors, (9150), 2743 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 9150 transitions. [2022-03-15 16:17:40,741 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 9150 transitions. Word has length 24 [2022-03-15 16:17:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:40,741 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 9150 transitions. [2022-03-15 16:17:40,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 9150 transitions. [2022-03-15 16:17:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:40,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:40,745 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] [2022-03-15 16:17:40,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-03-15 16:17:40,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-15 16:17:40,946 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash -145634084, now seen corresponding path program 1 times [2022-03-15 16:17:40,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:40,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306293319] [2022-03-15 16:17:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:41,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:41,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306293319] [2022-03-15 16:17:41,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306293319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:41,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425662443] [2022-03-15 16:17:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:41,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:41,154 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-15 16:17:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:41,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,459 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:17:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:41,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:41,769 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:41,770 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 20 treesize of output 43 [2022-03-15 16:17:41,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:41,824 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 20 treesize of output 3 [2022-03-15 16:17:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:41,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425662443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:41,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:41,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:17:41,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222383049] [2022-03-15 16:17:41,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:17:41,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:17:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:17:41,841 INFO L87 Difference]: Start difference. First operand 2744 states and 9150 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:43,368 INFO L93 Difference]: Finished difference Result 3704 states and 12061 transitions. [2022-03-15 16:17:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:17:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:43,375 INFO L225 Difference]: With dead ends: 3704 [2022-03-15 16:17:43,375 INFO L226 Difference]: Without dead ends: 3702 [2022-03-15 16:17:43,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:17:43,375 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 220 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:43,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 267 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1814 Invalid, 0 Unknown, 584 Unchecked, 0.8s Time] [2022-03-15 16:17:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-15 16:17:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 2746. [2022-03-15 16:17:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.336976320582878) internal successors, (9160), 2745 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 9160 transitions. [2022-03-15 16:17:43,418 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 9160 transitions. Word has length 24 [2022-03-15 16:17:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:43,418 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 9160 transitions. [2022-03-15 16:17:43,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 9160 transitions. [2022-03-15 16:17:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:43,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:43,422 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] [2022-03-15 16:17:43,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-15 16:17:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:43,622 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2083192027, now seen corresponding path program 3 times [2022-03-15 16:17:43,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:43,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361946616] [2022-03-15 16:17:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:43,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:43,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361946616] [2022-03-15 16:17:43,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361946616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:43,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202171760] [2022-03-15 16:17:43,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:43,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:43,841 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:43,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-15 16:17:43,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:17:43,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:17:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:44,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:44,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:44,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:44,198 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-15 16:17:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:44,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:44,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:44,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:44,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:44,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:17:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:44,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202171760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:44,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:44,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-15 16:17:44,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267916947] [2022-03-15 16:17:44,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:44,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:17:44,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:17:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:17:44,993 INFO L87 Difference]: Start difference. First operand 2746 states and 9160 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:47,849 INFO L93 Difference]: Finished difference Result 3932 states and 13282 transitions. [2022-03-15 16:17:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:17:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:17:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:47,856 INFO L225 Difference]: With dead ends: 3932 [2022-03-15 16:17:47,856 INFO L226 Difference]: Without dead ends: 3928 [2022-03-15 16:17:47,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=612, Invalid=4644, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:17:47,857 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1478 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:47,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 181 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 814 Invalid, 0 Unknown, 1478 Unchecked, 0.4s Time] [2022-03-15 16:17:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2022-03-15 16:17:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 2769. [2022-03-15 16:17:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 3.328757225433526) internal successors, (9214), 2768 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 9214 transitions. [2022-03-15 16:17:47,920 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 9214 transitions. Word has length 24 [2022-03-15 16:17:47,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:47,920 INFO L470 AbstractCegarLoop]: Abstraction has 2769 states and 9214 transitions. [2022-03-15 16:17:47,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 9214 transitions. [2022-03-15 16:17:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:47,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:47,923 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] [2022-03-15 16:17:47,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-15 16:17:48,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:48,124 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash -707981535, now seen corresponding path program 4 times [2022-03-15 16:17:48,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:48,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492697399] [2022-03-15 16:17:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:48,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:48,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492697399] [2022-03-15 16:17:48,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492697399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:48,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267607247] [2022-03-15 16:17:48,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:48,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:48,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:48,339 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:48,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-15 16:17:48,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:48,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:48,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:48,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:48,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:48,654 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 17 [2022-03-15 16:17:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:48,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:48,963 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:48,963 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:17:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:49,009 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 20 treesize of output 3 [2022-03-15 16:17:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:49,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267607247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:49,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:49,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:17:49,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906754025] [2022-03-15 16:17:49,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:49,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:17:49,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:17:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:17:49,026 INFO L87 Difference]: Start difference. First operand 2769 states and 9214 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:49,930 INFO L93 Difference]: Finished difference Result 3161 states and 10431 transitions. [2022-03-15 16:17:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:17:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:49,936 INFO L225 Difference]: With dead ends: 3161 [2022-03-15 16:17:49,936 INFO L226 Difference]: Without dead ends: 3155 [2022-03-15 16:17:49,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:17:49,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:49,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 173 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1113 Invalid, 0 Unknown, 629 Unchecked, 0.5s Time] [2022-03-15 16:17:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-03-15 16:17:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2773. [2022-03-15 16:17:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 3.327200577200577) internal successors, (9223), 2772 states have internal predecessors, (9223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 9223 transitions. [2022-03-15 16:17:49,974 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 9223 transitions. Word has length 24 [2022-03-15 16:17:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:49,975 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 9223 transitions. [2022-03-15 16:17:49,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 9223 transitions. [2022-03-15 16:17:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:49,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:49,979 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] [2022-03-15 16:17:49,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-15 16:17:50,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:50,179 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1132045153, now seen corresponding path program 5 times [2022-03-15 16:17:50,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:50,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657377926] [2022-03-15 16:17:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:50,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:50,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:50,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657377926] [2022-03-15 16:17:50,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657377926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:50,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698063049] [2022-03-15 16:17:50,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:50,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:50,399 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:50,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-15 16:17:50,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:17:50,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:50,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:50,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:50,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:50,717 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 37 treesize of output 21 [2022-03-15 16:17:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:50,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:51,001 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:51,001 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 20 treesize of output 43 [2022-03-15 16:17:51,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:51,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:51,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:51,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:17:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:51,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698063049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:51,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:51,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:17:51,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062690260] [2022-03-15 16:17:51,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:51,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:17:51,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:17:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:17:51,071 INFO L87 Difference]: Start difference. First operand 2773 states and 9223 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:52,208 INFO L93 Difference]: Finished difference Result 3090 states and 10233 transitions. [2022-03-15 16:17:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:17:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:17:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:52,215 INFO L225 Difference]: With dead ends: 3090 [2022-03-15 16:17:52,215 INFO L226 Difference]: Without dead ends: 3085 [2022-03-15 16:17:52,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:17:52,215 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:52,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 101 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 960 Invalid, 0 Unknown, 166 Unchecked, 0.8s Time] [2022-03-15 16:17:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-03-15 16:17:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2774. [2022-03-15 16:17:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 3.326721961774252) internal successors, (9225), 2773 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 9225 transitions. [2022-03-15 16:17:52,252 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 9225 transitions. Word has length 24 [2022-03-15 16:17:52,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:52,252 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 9225 transitions. [2022-03-15 16:17:52,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 9225 transitions. [2022-03-15 16:17:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:52,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:52,255 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] [2022-03-15 16:17:52,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-15 16:17:52,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:52,456 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash -675409310, now seen corresponding path program 2 times [2022-03-15 16:17:52,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:52,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162900703] [2022-03-15 16:17:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:52,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:52,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162900703] [2022-03-15 16:17:52,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162900703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:52,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036716026] [2022-03-15 16:17:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:52,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:52,685 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:52,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-15 16:17:52,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:52,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:53,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:53,286 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 31 treesize of output 43 [2022-03-15 16:17:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:53,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:54,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:54,130 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 41 treesize of output 46 [2022-03-15 16:17:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:54,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036716026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:54,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:54,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-15 16:17:54,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496632071] [2022-03-15 16:17:54,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:54,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:17:54,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:17:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:17:54,230 INFO L87 Difference]: Start difference. First operand 2774 states and 9225 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:54,990 INFO L93 Difference]: Finished difference Result 3203 states and 10594 transitions. [2022-03-15 16:17:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:17:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 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 24 [2022-03-15 16:17:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:54,997 INFO L225 Difference]: With dead ends: 3203 [2022-03-15 16:17:54,997 INFO L226 Difference]: Without dead ends: 3193 [2022-03-15 16:17:54,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:17:54,997 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:54,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 159 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 517 Invalid, 0 Unknown, 727 Unchecked, 0.2s Time] [2022-03-15 16:17:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2022-03-15 16:17:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2816. [2022-03-15 16:17:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 3.3232682060390766) internal successors, (9355), 2815 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 9355 transitions. [2022-03-15 16:17:55,051 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 9355 transitions. Word has length 24 [2022-03-15 16:17:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:55,051 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 9355 transitions. [2022-03-15 16:17:55,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 9355 transitions. [2022-03-15 16:17:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:55,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:55,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:55,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-15 16:17:55,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-15 16:17:55,256 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1669518013, now seen corresponding path program 6 times [2022-03-15 16:17:55,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:55,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417902451] [2022-03-15 16:17:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:55,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:55,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417902451] [2022-03-15 16:17:55,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417902451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:55,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108195252] [2022-03-15 16:17:55,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:55,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:55,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:55,488 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:55,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-15 16:17:55,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:17:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:55,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:55,865 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 35 treesize of output 47 [2022-03-15 16:17:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:56,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:56,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:56,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:56,538 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 45 treesize of output 7 [2022-03-15 16:17:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:56,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108195252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:56,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:56,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:17:56,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586876657] [2022-03-15 16:17:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:56,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:17:56,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:17:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:17:56,568 INFO L87 Difference]: Start difference. First operand 2816 states and 9355 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:58,424 INFO L93 Difference]: Finished difference Result 3691 states and 12172 transitions. [2022-03-15 16:17:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:17:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:17:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:58,431 INFO L225 Difference]: With dead ends: 3691 [2022-03-15 16:17:58,431 INFO L226 Difference]: Without dead ends: 3679 [2022-03-15 16:17:58,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=396, Invalid=3264, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:17:58,432 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 248 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 951 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:58,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 159 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1247 Invalid, 0 Unknown, 951 Unchecked, 0.6s Time] [2022-03-15 16:17:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-03-15 16:17:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 2821. [2022-03-15 16:17:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 3.322340425531915) internal successors, (9369), 2820 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 9369 transitions. [2022-03-15 16:17:58,473 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 9369 transitions. Word has length 24 [2022-03-15 16:17:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:58,473 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 9369 transitions. [2022-03-15 16:17:58,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 9369 transitions. [2022-03-15 16:17:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:58,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:58,476 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] [2022-03-15 16:17:58,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-15 16:17:58,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-15 16:17:58,677 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:17:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1797751905, now seen corresponding path program 7 times [2022-03-15 16:17:58,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:58,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810379751] [2022-03-15 16:17:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:58,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:58,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810379751] [2022-03-15 16:17:58,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810379751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:58,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930424402] [2022-03-15 16:17:58,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:58,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:58,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:58,935 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:58,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-15 16:17:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:17:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:59,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:59,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:59,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:59,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-15 16:17:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:59,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:59,529 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:17:59,529 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 20 treesize of output 43 [2022-03-15 16:17:59,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:59,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:59,583 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 20 treesize of output 3 [2022-03-15 16:17:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:59,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930424402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:59,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:59,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:17:59,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535503868] [2022-03-15 16:17:59,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:59,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:17:59,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:17:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:17:59,601 INFO L87 Difference]: Start difference. First operand 2821 states and 9369 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:01,069 INFO L93 Difference]: Finished difference Result 3239 states and 10730 transitions. [2022-03-15 16:18:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:18:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:01,076 INFO L225 Difference]: With dead ends: 3239 [2022-03-15 16:18:01,076 INFO L226 Difference]: Without dead ends: 3233 [2022-03-15 16:18:01,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:18:01,076 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:01,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 155 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1730 Invalid, 0 Unknown, 187 Unchecked, 0.7s Time] [2022-03-15 16:18:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2022-03-15 16:18:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2824. [2022-03-15 16:18:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 3.3209351753453773) internal successors, (9375), 2823 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 9375 transitions. [2022-03-15 16:18:01,112 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 9375 transitions. Word has length 24 [2022-03-15 16:18:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:01,112 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 9375 transitions. [2022-03-15 16:18:01,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 9375 transitions. [2022-03-15 16:18:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:01,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:01,116 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] [2022-03-15 16:18:01,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:01,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:01,318 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:01,318 INFO L85 PathProgramCache]: Analyzing trace with hash -88843783, now seen corresponding path program 8 times [2022-03-15 16:18:01,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:01,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096170058] [2022-03-15 16:18:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:01,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:01,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:01,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096170058] [2022-03-15 16:18:01,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096170058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:01,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489701907] [2022-03-15 16:18:01,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:01,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:01,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:01,569 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:01,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-15 16:18:01,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:01,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:01,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:18:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:01,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:01,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:01,822 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-03-15 16:18:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:02,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:02,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:02,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:02,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:02,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:18:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:02,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489701907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:02,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:02,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:18:02,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617003594] [2022-03-15 16:18:02,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:02,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:18:02,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:02,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:18:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:18:02,742 INFO L87 Difference]: Start difference. First operand 2824 states and 9375 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:04,365 INFO L93 Difference]: Finished difference Result 3894 states and 13205 transitions. [2022-03-15 16:18:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:18:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 24 [2022-03-15 16:18:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:04,373 INFO L225 Difference]: With dead ends: 3894 [2022-03-15 16:18:04,373 INFO L226 Difference]: Without dead ends: 3884 [2022-03-15 16:18:04,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=388, Invalid=2264, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:18:04,373 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:04,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 177 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1015 Invalid, 0 Unknown, 969 Unchecked, 0.4s Time] [2022-03-15 16:18:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-03-15 16:18:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2829. [2022-03-15 16:18:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 3.3185997171145685) internal successors, (9385), 2828 states have internal predecessors, (9385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 9385 transitions. [2022-03-15 16:18:04,415 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 9385 transitions. Word has length 24 [2022-03-15 16:18:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:04,415 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 9385 transitions. [2022-03-15 16:18:04,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 9385 transitions. [2022-03-15 16:18:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:04,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:04,419 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] [2022-03-15 16:18:04,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:04,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-15 16:18:04,621 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1169351643, now seen corresponding path program 9 times [2022-03-15 16:18:04,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:04,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49401774] [2022-03-15 16:18:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:04,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:04,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49401774] [2022-03-15 16:18:04,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49401774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:04,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15620820] [2022-03-15 16:18:04,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:04,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:04,868 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:04,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-15 16:18:04,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:18:04,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:18:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,237 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 30 treesize of output 20 [2022-03-15 16:18:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:05,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:05,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:05,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:18:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:05,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15620820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:05,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:05,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:18:05,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733681181] [2022-03-15 16:18:05,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:05,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:18:05,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:18:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:18:05,759 INFO L87 Difference]: Start difference. First operand 2829 states and 9385 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:06,741 INFO L93 Difference]: Finished difference Result 3115 states and 10344 transitions. [2022-03-15 16:18:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:18:06,742 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 24 [2022-03-15 16:18:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:06,748 INFO L225 Difference]: With dead ends: 3115 [2022-03-15 16:18:06,748 INFO L226 Difference]: Without dead ends: 3109 [2022-03-15 16:18:06,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:18:06,748 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 920 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:06,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 129 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1238 Invalid, 0 Unknown, 920 Unchecked, 0.5s Time] [2022-03-15 16:18:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-03-15 16:18:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-03-15 16:18:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 3.317667844522968) internal successors, (9389), 2830 states have internal predecessors, (9389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 9389 transitions. [2022-03-15 16:18:06,788 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 9389 transitions. Word has length 24 [2022-03-15 16:18:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:06,788 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 9389 transitions. [2022-03-15 16:18:06,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 9389 transitions. [2022-03-15 16:18:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:06,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:06,793 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] [2022-03-15 16:18:06,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-15 16:18:06,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-15 16:18:06,993 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash 979444893, now seen corresponding path program 10 times [2022-03-15 16:18:06,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:06,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124285045] [2022-03-15 16:18:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:07,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:07,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124285045] [2022-03-15 16:18:07,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124285045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:07,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583672325] [2022-03-15 16:18:07,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:07,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:07,248 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-15 16:18:07,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:07,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:07,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:07,484 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 30 treesize of output 16 [2022-03-15 16:18:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:07,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:07,818 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:07,818 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 20 treesize of output 43 [2022-03-15 16:18:07,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:07,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:07,876 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 20 treesize of output 3 [2022-03-15 16:18:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:07,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583672325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:07,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:07,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:18:07,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966414720] [2022-03-15 16:18:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:07,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:18:07,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:18:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:18:07,894 INFO L87 Difference]: Start difference. First operand 2831 states and 9389 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:08,894 INFO L93 Difference]: Finished difference Result 3104 states and 10273 transitions. [2022-03-15 16:18:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:18:08,895 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 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 24 [2022-03-15 16:18:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:08,901 INFO L225 Difference]: With dead ends: 3104 [2022-03-15 16:18:08,901 INFO L226 Difference]: Without dead ends: 3090 [2022-03-15 16:18:08,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:18:08,901 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:08,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 109 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1319 Invalid, 0 Unknown, 458 Unchecked, 0.5s Time] [2022-03-15 16:18:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2022-03-15 16:18:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2827. [2022-03-15 16:18:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 3.319532908704883) internal successors, (9381), 2826 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 9381 transitions. [2022-03-15 16:18:08,950 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 9381 transitions. Word has length 24 [2022-03-15 16:18:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:08,950 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 9381 transitions. [2022-03-15 16:18:08,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 9381 transitions. [2022-03-15 16:18:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:08,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:08,953 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] [2022-03-15 16:18:08,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-15 16:18:09,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:09,154 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1715641972, now seen corresponding path program 20 times [2022-03-15 16:18:09,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:09,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010755507] [2022-03-15 16:18:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:09,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:09,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:09,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010755507] [2022-03-15 16:18:09,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010755507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:09,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132127009] [2022-03-15 16:18:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:09,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:09,369 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:09,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-15 16:18:09,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:09,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:18:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:09,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:09,894 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 21 [2022-03-15 16:18:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:09,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:10,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:10,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:10,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:18:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:10,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132127009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:10,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:10,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:18:10,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256337420] [2022-03-15 16:18:10,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:10,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:18:10,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:18:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:18:10,417 INFO L87 Difference]: Start difference. First operand 2827 states and 9381 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:12,361 INFO L93 Difference]: Finished difference Result 3858 states and 12515 transitions. [2022-03-15 16:18:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:18:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:18:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:12,369 INFO L225 Difference]: With dead ends: 3858 [2022-03-15 16:18:12,369 INFO L226 Difference]: Without dead ends: 3854 [2022-03-15 16:18:12,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=347, Invalid=2959, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:18:12,369 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 169 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1013 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:12,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 305 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2120 Invalid, 0 Unknown, 1013 Unchecked, 0.9s Time] [2022-03-15 16:18:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2022-03-15 16:18:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2849. [2022-03-15 16:18:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.315308988764045) internal successors, (9442), 2848 states have internal predecessors, (9442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9442 transitions. [2022-03-15 16:18:12,425 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9442 transitions. Word has length 24 [2022-03-15 16:18:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 9442 transitions. [2022-03-15 16:18:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9442 transitions. [2022-03-15 16:18:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:12,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:12,429 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] [2022-03-15 16:18:12,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-15 16:18:12,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-03-15 16:18:12,630 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash 425277236, now seen corresponding path program 21 times [2022-03-15 16:18:12,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:12,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039705150] [2022-03-15 16:18:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:12,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:12,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:12,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039705150] [2022-03-15 16:18:12,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039705150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:12,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706135130] [2022-03-15 16:18:12,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:12,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:12,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:12,834 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:12,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-15 16:18:12,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:18:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:12,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:18:12,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:13,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:13,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:13,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:13,177 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:18:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:13,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:13,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:13,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:13,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:13,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:18:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:13,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706135130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:13,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:13,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-15 16:18:13,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933656996] [2022-03-15 16:18:13,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:13,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:18:13,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:18:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:18:13,982 INFO L87 Difference]: Start difference. First operand 2849 states and 9442 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:16,682 INFO L93 Difference]: Finished difference Result 4571 states and 14831 transitions. [2022-03-15 16:18:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:18:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:18:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:16,691 INFO L225 Difference]: With dead ends: 4571 [2022-03-15 16:18:16,691 INFO L226 Difference]: Without dead ends: 4548 [2022-03-15 16:18:16,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=609, Invalid=6701, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:18:16,692 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 243 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1898 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:16,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 334 Invalid, 3505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1570 Invalid, 0 Unknown, 1898 Unchecked, 0.7s Time] [2022-03-15 16:18:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2022-03-15 16:18:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2893. [2022-03-15 16:18:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 3.3029045643153525) internal successors, (9552), 2892 states have internal predecessors, (9552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 9552 transitions. [2022-03-15 16:18:16,760 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 9552 transitions. Word has length 24 [2022-03-15 16:18:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:16,760 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 9552 transitions. [2022-03-15 16:18:16,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 9552 transitions. [2022-03-15 16:18:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:16,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:16,764 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] [2022-03-15 16:18:16,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-15 16:18:16,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:16,964 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash -839168338, now seen corresponding path program 22 times [2022-03-15 16:18:16,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:16,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66609503] [2022-03-15 16:18:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:17,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:17,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66609503] [2022-03-15 16:18:17,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66609503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:17,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851949518] [2022-03-15 16:18:17,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:17,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:17,172 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:17,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-15 16:18:17,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:17,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,476 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 37 treesize of output 21 [2022-03-15 16:18:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:17,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:17,778 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:17,778 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 20 treesize of output 43 [2022-03-15 16:18:17,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:18:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:17,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851949518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:17,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:17,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:17,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342505004] [2022-03-15 16:18:17,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:17,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:17,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:17,852 INFO L87 Difference]: Start difference. First operand 2893 states and 9552 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:19,569 INFO L93 Difference]: Finished difference Result 3909 states and 12712 transitions. [2022-03-15 16:18:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:18:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:19,577 INFO L225 Difference]: With dead ends: 3909 [2022-03-15 16:18:19,577 INFO L226 Difference]: Without dead ends: 3903 [2022-03-15 16:18:19,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=2393, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:18:19,577 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 203 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1388 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:19,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2051 Invalid, 0 Unknown, 1388 Unchecked, 0.8s Time] [2022-03-15 16:18:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-03-15 16:18:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2884. [2022-03-15 16:18:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 3.3066250433576134) internal successors, (9533), 2883 states have internal predecessors, (9533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 9533 transitions. [2022-03-15 16:18:19,634 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 9533 transitions. Word has length 24 [2022-03-15 16:18:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:19,634 INFO L470 AbstractCegarLoop]: Abstraction has 2884 states and 9533 transitions. [2022-03-15 16:18:19,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 9533 transitions. [2022-03-15 16:18:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:19,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:19,637 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] [2022-03-15 16:18:19,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:19,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:19,838 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1168030766, now seen corresponding path program 23 times [2022-03-15 16:18:19,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:19,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146873422] [2022-03-15 16:18:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:19,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:20,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146873422] [2022-03-15 16:18:20,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146873422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384089486] [2022-03-15 16:18:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:20,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:20,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:20,047 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:20,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-15 16:18:20,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:18:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:20,357 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 17 [2022-03-15 16:18:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:20,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:20,661 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:20,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:18:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:20,707 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 20 treesize of output 3 [2022-03-15 16:18:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:20,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384089486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:20,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:20,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:20,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209730203] [2022-03-15 16:18:20,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:20,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:20,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:20,725 INFO L87 Difference]: Start difference. First operand 2884 states and 9533 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:22,107 INFO L93 Difference]: Finished difference Result 3563 states and 11679 transitions. [2022-03-15 16:18:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:18:22,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:22,114 INFO L225 Difference]: With dead ends: 3563 [2022-03-15 16:18:22,114 INFO L226 Difference]: Without dead ends: 3559 [2022-03-15 16:18:22,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:18:22,114 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:22,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 255 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1640 Invalid, 0 Unknown, 984 Unchecked, 0.7s Time] [2022-03-15 16:18:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-03-15 16:18:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2881. [2022-03-15 16:18:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.3072916666666665) internal successors, (9525), 2880 states have internal predecessors, (9525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:22,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9525 transitions. [2022-03-15 16:18:22,161 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9525 transitions. Word has length 24 [2022-03-15 16:18:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:22,161 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9525 transitions. [2022-03-15 16:18:22,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9525 transitions. [2022-03-15 16:18:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:22,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:22,165 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] [2022-03-15 16:18:22,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-15 16:18:22,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:22,365 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1862490956, now seen corresponding path program 24 times [2022-03-15 16:18:22,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:22,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684553793] [2022-03-15 16:18:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:22,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:22,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684553793] [2022-03-15 16:18:22,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684553793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:22,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347373045] [2022-03-15 16:18:22,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:18:22,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:22,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:22,581 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:22,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-15 16:18:22,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:18:22,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:18:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:23,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:23,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2022-03-15 16:18:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:23,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:24,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:24,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:24,145 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 41 treesize of output 7 [2022-03-15 16:18:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:24,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347373045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:24,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:24,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:18:24,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145212080] [2022-03-15 16:18:24,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:24,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:18:24,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:18:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:18:24,178 INFO L87 Difference]: Start difference. First operand 2881 states and 9525 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:25,335 INFO L93 Difference]: Finished difference Result 3552 states and 11594 transitions. [2022-03-15 16:18:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 16:18:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:25,356 INFO L225 Difference]: With dead ends: 3552 [2022-03-15 16:18:25,356 INFO L226 Difference]: Without dead ends: 3550 [2022-03-15 16:18:25,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:18:25,357 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1224 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:25,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 241 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 967 Invalid, 0 Unknown, 1224 Unchecked, 0.4s Time] [2022-03-15 16:18:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-03-15 16:18:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2881. [2022-03-15 16:18:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.307986111111111) internal successors, (9527), 2880 states have internal predecessors, (9527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9527 transitions. [2022-03-15 16:18:25,392 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9527 transitions. Word has length 24 [2022-03-15 16:18:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:25,392 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9527 transitions. [2022-03-15 16:18:25,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9527 transitions. [2022-03-15 16:18:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:25,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:25,396 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] [2022-03-15 16:18:25,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-15 16:18:25,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:25,596 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2073766699, now seen corresponding path program 11 times [2022-03-15 16:18:25,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:25,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434866672] [2022-03-15 16:18:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:25,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:25,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:25,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434866672] [2022-03-15 16:18:25,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434866672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:25,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623197247] [2022-03-15 16:18:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:25,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:25,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:25,801 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:25,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-15 16:18:25,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:18:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:26,101 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 37 treesize of output 21 [2022-03-15 16:18:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:26,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:26,421 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:26,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:18:26,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:26,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:26,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:26,475 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 20 treesize of output 3 [2022-03-15 16:18:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:26,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623197247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:26,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:26,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:26,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418621300] [2022-03-15 16:18:26,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:26,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:26,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:26,493 INFO L87 Difference]: Start difference. First operand 2881 states and 9527 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:28,243 INFO L93 Difference]: Finished difference Result 3635 states and 11750 transitions. [2022-03-15 16:18:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:18:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:28,250 INFO L225 Difference]: With dead ends: 3635 [2022-03-15 16:18:28,250 INFO L226 Difference]: Without dead ends: 3629 [2022-03-15 16:18:28,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:18:28,251 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 141 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:28,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 246 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2216 Invalid, 0 Unknown, 334 Unchecked, 0.9s Time] [2022-03-15 16:18:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-03-15 16:18:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2899. [2022-03-15 16:18:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 3.303312629399586) internal successors, (9573), 2898 states have internal predecessors, (9573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 9573 transitions. [2022-03-15 16:18:28,310 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 9573 transitions. Word has length 24 [2022-03-15 16:18:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 9573 transitions. [2022-03-15 16:18:28,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 9573 transitions. [2022-03-15 16:18:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:28,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:28,314 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] [2022-03-15 16:18:28,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-15 16:18:28,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-15 16:18:28,514 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash -80281389, now seen corresponding path program 12 times [2022-03-15 16:18:28,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:28,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423234758] [2022-03-15 16:18:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:28,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:28,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423234758] [2022-03-15 16:18:28,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423234758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:28,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789970993] [2022-03-15 16:18:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:18:28,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:28,723 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:28,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-15 16:18:28,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:18:28,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:28,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,024 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 17 [2022-03-15 16:18:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:29,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:29,327 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:29,328 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 20 treesize of output 43 [2022-03-15 16:18:29,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:18:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:29,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789970993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:29,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:29,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:29,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113236922] [2022-03-15 16:18:29,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:29,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:29,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:29,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:29,402 INFO L87 Difference]: Start difference. First operand 2899 states and 9573 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:31,045 INFO L93 Difference]: Finished difference Result 3653 states and 11797 transitions. [2022-03-15 16:18:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 16:18:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:31,053 INFO L225 Difference]: With dead ends: 3653 [2022-03-15 16:18:31,053 INFO L226 Difference]: Without dead ends: 3649 [2022-03-15 16:18:31,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:18:31,053 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:31,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 223 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1991 Invalid, 0 Unknown, 740 Unchecked, 0.8s Time] [2022-03-15 16:18:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-03-15 16:18:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 2897. [2022-03-15 16:18:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.304558011049724) internal successors, (9570), 2896 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 9570 transitions. [2022-03-15 16:18:31,119 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 9570 transitions. Word has length 24 [2022-03-15 16:18:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:31,119 INFO L470 AbstractCegarLoop]: Abstraction has 2897 states and 9570 transitions. [2022-03-15 16:18:31,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 9570 transitions. [2022-03-15 16:18:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:31,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:31,123 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] [2022-03-15 16:18:31,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-15 16:18:31,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:31,323 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1344726963, now seen corresponding path program 13 times [2022-03-15 16:18:31,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:31,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138548254] [2022-03-15 16:18:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:31,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:31,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:31,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138548254] [2022-03-15 16:18:31,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138548254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:31,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008185346] [2022-03-15 16:18:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:18:31,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:31,583 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-15 16:18:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:31,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:31,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:31,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:18:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:32,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:32,289 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:32,289 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 20 treesize of output 43 [2022-03-15 16:18:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:32,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:32,337 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 20 treesize of output 3 [2022-03-15 16:18:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:32,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008185346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:32,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:32,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:32,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21144011] [2022-03-15 16:18:32,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:32,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:32,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:32,355 INFO L87 Difference]: Start difference. First operand 2897 states and 9570 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:34,123 INFO L93 Difference]: Finished difference Result 3770 states and 12207 transitions. [2022-03-15 16:18:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:18:34,124 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:34,131 INFO L225 Difference]: With dead ends: 3770 [2022-03-15 16:18:34,131 INFO L226 Difference]: Without dead ends: 3765 [2022-03-15 16:18:34,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:18:34,132 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:34,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 250 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2140 Invalid, 0 Unknown, 548 Unchecked, 0.9s Time] [2022-03-15 16:18:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2022-03-15 16:18:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 2894. [2022-03-15 16:18:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 3.3066021431040444) internal successors, (9566), 2893 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 9566 transitions. [2022-03-15 16:18:34,178 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 9566 transitions. Word has length 24 [2022-03-15 16:18:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:34,178 INFO L470 AbstractCegarLoop]: Abstraction has 2894 states and 9566 transitions. [2022-03-15 16:18:34,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 9566 transitions. [2022-03-15 16:18:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:34,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:34,197 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] [2022-03-15 16:18:34,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-15 16:18:34,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-15 16:18:34,398 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash -298378899, now seen corresponding path program 14 times [2022-03-15 16:18:34,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:34,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592633861] [2022-03-15 16:18:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:34,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:34,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:34,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592633861] [2022-03-15 16:18:34,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592633861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:34,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566455617] [2022-03-15 16:18:34,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:34,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:34,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:34,609 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:34,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-15 16:18:34,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:34,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:34,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:34,991 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 35 treesize of output 47 [2022-03-15 16:18:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:35,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:35,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:35,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:35,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,663 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 45 treesize of output 7 [2022-03-15 16:18:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:35,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566455617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:35,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:35,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:18:35,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174362462] [2022-03-15 16:18:35,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:35,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:18:35,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:18:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:18:35,695 INFO L87 Difference]: Start difference. First operand 2894 states and 9566 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:37,726 INFO L93 Difference]: Finished difference Result 3599 states and 11791 transitions. [2022-03-15 16:18:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:18:37,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:37,733 INFO L225 Difference]: With dead ends: 3599 [2022-03-15 16:18:37,733 INFO L226 Difference]: Without dead ends: 3588 [2022-03-15 16:18:37,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:18:37,734 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:37,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 226 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1504 Invalid, 0 Unknown, 736 Unchecked, 0.7s Time] [2022-03-15 16:18:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-03-15 16:18:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2903. [2022-03-15 16:18:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 3.304272915230875) internal successors, (9589), 2902 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 9589 transitions. [2022-03-15 16:18:37,773 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 9589 transitions. Word has length 24 [2022-03-15 16:18:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:37,773 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 9589 transitions. [2022-03-15 16:18:37,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 9589 transitions. [2022-03-15 16:18:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:37,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:37,776 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] [2022-03-15 16:18:37,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-15 16:18:37,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-15 16:18:37,977 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2095330258, now seen corresponding path program 3 times [2022-03-15 16:18:37,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:37,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017730156] [2022-03-15 16:18:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:37,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:38,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:38,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017730156] [2022-03-15 16:18:38,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017730156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:38,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074453379] [2022-03-15 16:18:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:38,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:38,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:38,189 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:38,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-15 16:18:38,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:18:38,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:18:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:38,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:38,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:18:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:38,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:39,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:39,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:39,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:18:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:39,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074453379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:39,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:39,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-15 16:18:39,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460632078] [2022-03-15 16:18:39,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:39,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:18:39,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:18:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:18:39,356 INFO L87 Difference]: Start difference. First operand 2903 states and 9589 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:42,024 INFO L93 Difference]: Finished difference Result 4287 states and 14504 transitions. [2022-03-15 16:18:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:18:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 24 [2022-03-15 16:18:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:42,033 INFO L225 Difference]: With dead ends: 4287 [2022-03-15 16:18:42,033 INFO L226 Difference]: Without dead ends: 4283 [2022-03-15 16:18:42,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:18:42,034 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 156 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1308 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:42,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 187 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 839 Invalid, 0 Unknown, 1308 Unchecked, 0.4s Time] [2022-03-15 16:18:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2022-03-15 16:18:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2917. [2022-03-15 16:18:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 3.300068587105624) internal successors, (9623), 2916 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 9623 transitions. [2022-03-15 16:18:42,096 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 9623 transitions. Word has length 24 [2022-03-15 16:18:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:42,096 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 9623 transitions. [2022-03-15 16:18:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 9623 transitions. [2022-03-15 16:18:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:42,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:42,101 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] [2022-03-15 16:18:42,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-15 16:18:42,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-15 16:18:42,301 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash -485076915, now seen corresponding path program 15 times [2022-03-15 16:18:42,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:42,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397442879] [2022-03-15 16:18:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:42,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:42,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397442879] [2022-03-15 16:18:42,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397442879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:42,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987829969] [2022-03-15 16:18:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:42,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:42,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:42,505 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:42,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-15 16:18:42,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:18:42,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:18:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:42,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:42,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:42,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-15 16:18:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:43,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:43,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:43,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:43,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:18:43,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2022-03-15 16:18:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:43,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987829969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:43,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:43,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:18:43,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201556956] [2022-03-15 16:18:43,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:43,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:18:43,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:18:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:18:43,592 INFO L87 Difference]: Start difference. First operand 2917 states and 9623 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:44,339 INFO L93 Difference]: Finished difference Result 4262 states and 14510 transitions. [2022-03-15 16:18:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:18:44,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 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 24 [2022-03-15 16:18:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:44,348 INFO L225 Difference]: With dead ends: 4262 [2022-03-15 16:18:44,348 INFO L226 Difference]: Without dead ends: 4257 [2022-03-15 16:18:44,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:18:44,348 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 164 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1343 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:44,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 212 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 452 Invalid, 0 Unknown, 1343 Unchecked, 0.2s Time] [2022-03-15 16:18:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-03-15 16:18:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 2954. [2022-03-15 16:18:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.3064679986454455) internal successors, (9764), 2953 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9764 transitions. [2022-03-15 16:18:44,417 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9764 transitions. Word has length 24 [2022-03-15 16:18:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9764 transitions. [2022-03-15 16:18:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9764 transitions. [2022-03-15 16:18:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:44,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:44,421 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] [2022-03-15 16:18:44,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-03-15 16:18:44,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:44,622 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 932179860, now seen corresponding path program 4 times [2022-03-15 16:18:44,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:44,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564295644] [2022-03-15 16:18:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:44,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:44,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564295644] [2022-03-15 16:18:44,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564295644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:44,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351746751] [2022-03-15 16:18:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:44,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:44,836 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:44,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-15 16:18:44,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,152 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 37 treesize of output 21 [2022-03-15 16:18:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:45,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:45,457 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:45,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:18:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,516 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 20 treesize of output 3 [2022-03-15 16:18:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:45,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351746751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:45,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:45,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:45,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534273624] [2022-03-15 16:18:45,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:45,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:45,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:45,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:45,533 INFO L87 Difference]: Start difference. First operand 2954 states and 9764 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:47,202 INFO L93 Difference]: Finished difference Result 3975 states and 12950 transitions. [2022-03-15 16:18:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:18:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:47,210 INFO L225 Difference]: With dead ends: 3975 [2022-03-15 16:18:47,210 INFO L226 Difference]: Without dead ends: 3969 [2022-03-15 16:18:47,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:18:47,211 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 219 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:47,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 221 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1859 Invalid, 0 Unknown, 1199 Unchecked, 0.8s Time] [2022-03-15 16:18:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2022-03-15 16:18:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2940. [2022-03-15 16:18:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.307587614834978) internal successors, (9721), 2939 states have internal predecessors, (9721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9721 transitions. [2022-03-15 16:18:47,275 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9721 transitions. Word has length 24 [2022-03-15 16:18:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:47,275 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 9721 transitions. [2022-03-15 16:18:47,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9721 transitions. [2022-03-15 16:18:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:47,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:47,279 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] [2022-03-15 16:18:47,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-03-15 16:18:47,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:47,480 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -611607669, now seen corresponding path program 16 times [2022-03-15 16:18:47,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:47,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237075822] [2022-03-15 16:18:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:47,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:47,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237075822] [2022-03-15 16:18:47,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237075822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:47,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176867691] [2022-03-15 16:18:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:47,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:47,704 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:47,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-15 16:18:47,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:47,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:48,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:48,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:48,006 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 17 [2022-03-15 16:18:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:48,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:48,291 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:48,291 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 20 treesize of output 43 [2022-03-15 16:18:48,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:48,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:48,337 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 20 treesize of output 3 [2022-03-15 16:18:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:48,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176867691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:48,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:48,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:18:48,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143817382] [2022-03-15 16:18:48,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:48,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:18:48,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:18:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:18:48,355 INFO L87 Difference]: Start difference. First operand 2940 states and 9721 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:50,021 INFO L93 Difference]: Finished difference Result 4059 states and 13380 transitions. [2022-03-15 16:18:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:18:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:50,029 INFO L225 Difference]: With dead ends: 4059 [2022-03-15 16:18:50,029 INFO L226 Difference]: Without dead ends: 4053 [2022-03-15 16:18:50,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=2823, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:18:50,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:50,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 176 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1258 Invalid, 0 Unknown, 193 Unchecked, 0.6s Time] [2022-03-15 16:18:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2022-03-15 16:18:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 2954. [2022-03-15 16:18:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.304436166610227) internal successors, (9758), 2953 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9758 transitions. [2022-03-15 16:18:50,092 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9758 transitions. Word has length 24 [2022-03-15 16:18:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:50,093 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9758 transitions. [2022-03-15 16:18:50,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9758 transitions. [2022-03-15 16:18:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:50,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:50,097 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] [2022-03-15 16:18:50,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-15 16:18:50,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:50,297 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1875905164, now seen corresponding path program 5 times [2022-03-15 16:18:50,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:50,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102903973] [2022-03-15 16:18:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:50,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:50,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:50,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102903973] [2022-03-15 16:18:50,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102903973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:50,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452687846] [2022-03-15 16:18:50,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:50,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:50,524 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:50,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-15 16:18:50,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:18:50,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:50,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:50,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:50,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-15 16:18:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:50,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:51,113 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:51,113 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 20 treesize of output 43 [2022-03-15 16:18:51,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:51,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:51,173 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 20 treesize of output 3 [2022-03-15 16:18:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:51,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452687846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:51,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:51,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:18:51,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579544180] [2022-03-15 16:18:51,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:51,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:18:51,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:18:51,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:18:51,191 INFO L87 Difference]: Start difference. First operand 2954 states and 9758 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:52,817 INFO L93 Difference]: Finished difference Result 4296 states and 14293 transitions. [2022-03-15 16:18:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:18:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:52,826 INFO L225 Difference]: With dead ends: 4296 [2022-03-15 16:18:52,826 INFO L226 Difference]: Without dead ends: 4286 [2022-03-15 16:18:52,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=301, Invalid=2779, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:18:52,827 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:52,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 259 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1489 Invalid, 0 Unknown, 740 Unchecked, 0.7s Time] [2022-03-15 16:18:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-03-15 16:18:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 2949. [2022-03-15 16:18:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 3.305291723202171) internal successors, (9744), 2948 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 9744 transitions. [2022-03-15 16:18:52,876 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 9744 transitions. Word has length 24 [2022-03-15 16:18:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:52,876 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 9744 transitions. [2022-03-15 16:18:52,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 9744 transitions. [2022-03-15 16:18:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:52,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:52,880 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] [2022-03-15 16:18:52,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-03-15 16:18:53,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:53,081 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash 545643768, now seen corresponding path program 25 times [2022-03-15 16:18:53,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:53,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266643397] [2022-03-15 16:18:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:53,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:53,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266643397] [2022-03-15 16:18:53,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266643397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:53,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930028947] [2022-03-15 16:18:53,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:18:53,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:53,298 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:53,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-15 16:18:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:53,606 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 17 [2022-03-15 16:18:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:53,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:53,912 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:53,912 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 20 treesize of output 43 [2022-03-15 16:18:53,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:53,956 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 20 treesize of output 3 [2022-03-15 16:18:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:53,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930028947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:53,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:53,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:53,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887274970] [2022-03-15 16:18:53,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:53,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:53,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:53,974 INFO L87 Difference]: Start difference. First operand 2949 states and 9744 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:55,805 INFO L93 Difference]: Finished difference Result 3471 states and 11419 transitions. [2022-03-15 16:18:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:18:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:55,812 INFO L225 Difference]: With dead ends: 3471 [2022-03-15 16:18:55,812 INFO L226 Difference]: Without dead ends: 3465 [2022-03-15 16:18:55,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=298, Invalid=3008, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:18:55,812 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:55,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 191 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2069 Invalid, 0 Unknown, 658 Unchecked, 0.9s Time] [2022-03-15 16:18:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2022-03-15 16:18:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2959. [2022-03-15 16:18:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2958 states have (on average 3.3045977011494254) internal successors, (9775), 2958 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 9775 transitions. [2022-03-15 16:18:55,852 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 9775 transitions. Word has length 24 [2022-03-15 16:18:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:55,852 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 9775 transitions. [2022-03-15 16:18:55,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 9775 transitions. [2022-03-15 16:18:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:55,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:55,856 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] [2022-03-15 16:18:55,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-15 16:18:56,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:56,057 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1251307591, now seen corresponding path program 4 times [2022-03-15 16:18:56,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:56,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391013918] [2022-03-15 16:18:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:56,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:56,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391013918] [2022-03-15 16:18:56,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391013918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:56,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399941992] [2022-03-15 16:18:56,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:56,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:56,266 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:56,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-15 16:18:56,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:56,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:56,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:56,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:56,580 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 37 treesize of output 21 [2022-03-15 16:18:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:56,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:56,884 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:18:56,885 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 20 treesize of output 43 [2022-03-15 16:18:56,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:56,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:56,943 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 20 treesize of output 3 [2022-03-15 16:18:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:56,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399941992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:56,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:56,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:18:56,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321423639] [2022-03-15 16:18:56,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:56,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:18:56,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:18:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:18:56,961 INFO L87 Difference]: Start difference. First operand 2959 states and 9775 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:58,906 INFO L93 Difference]: Finished difference Result 3567 states and 11758 transitions. [2022-03-15 16:18:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:18:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:18:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:58,914 INFO L225 Difference]: With dead ends: 3567 [2022-03-15 16:18:58,914 INFO L226 Difference]: Without dead ends: 3561 [2022-03-15 16:18:58,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=297, Invalid=2895, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:18:58,914 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:58,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 181 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2329 Invalid, 0 Unknown, 751 Unchecked, 0.9s Time] [2022-03-15 16:18:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2022-03-15 16:18:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2967. [2022-03-15 16:18:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2966 states have (on average 3.3031018206338505) internal successors, (9797), 2966 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 9797 transitions. [2022-03-15 16:18:58,969 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 9797 transitions. Word has length 24 [2022-03-15 16:18:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:58,969 INFO L470 AbstractCegarLoop]: Abstraction has 2967 states and 9797 transitions. [2022-03-15 16:18:58,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 9797 transitions. [2022-03-15 16:18:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:18:58,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:58,973 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] [2022-03-15 16:18:58,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-15 16:18:59,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-03-15 16:18:59,173 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:18:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash 123902901, now seen corresponding path program 5 times [2022-03-15 16:18:59,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:59,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852049874] [2022-03-15 16:18:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:59,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:59,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:59,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852049874] [2022-03-15 16:18:59,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852049874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:59,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254128342] [2022-03-15 16:18:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:59,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:59,380 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:59,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-15 16:18:59,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:18:59,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:18:59,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:59,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:59,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:18:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:59,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:00,036 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:00,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:19:00,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:00,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:00,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:00,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:00,090 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 20 treesize of output 3 [2022-03-15 16:19:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:00,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254128342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:00,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:00,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:19:00,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878400811] [2022-03-15 16:19:00,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:00,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:19:00,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:19:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:19:00,107 INFO L87 Difference]: Start difference. First operand 2967 states and 9797 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:01,305 INFO L93 Difference]: Finished difference Result 3430 states and 11290 transitions. [2022-03-15 16:19:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:19:01,305 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:01,312 INFO L225 Difference]: With dead ends: 3430 [2022-03-15 16:19:01,312 INFO L226 Difference]: Without dead ends: 3428 [2022-03-15 16:19:01,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:19:01,312 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:01,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 140 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1212 Invalid, 0 Unknown, 395 Unchecked, 0.5s Time] [2022-03-15 16:19:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-03-15 16:19:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2966. [2022-03-15 16:19:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 3.303204047217538) internal successors, (9794), 2965 states have internal predecessors, (9794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 9794 transitions. [2022-03-15 16:19:01,353 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 9794 transitions. Word has length 24 [2022-03-15 16:19:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:01,353 INFO L470 AbstractCegarLoop]: Abstraction has 2966 states and 9794 transitions. [2022-03-15 16:19:01,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 9794 transitions. [2022-03-15 16:19:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:01,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:01,357 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] [2022-03-15 16:19:01,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-03-15 16:19:01,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-15 16:19:01,557 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 674726487, now seen corresponding path program 17 times [2022-03-15 16:19:01,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:01,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790003805] [2022-03-15 16:19:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:01,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:01,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790003805] [2022-03-15 16:19:01,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790003805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:01,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27745370] [2022-03-15 16:19:01,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:01,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:01,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:01,765 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:01,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-15 16:19:01,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:19:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:02,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:02,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:02,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2022-03-15 16:19:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:02,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:02,384 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:02,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:19:02,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:02,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:02,451 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 20 treesize of output 3 [2022-03-15 16:19:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:02,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27745370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:02,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:02,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:19:02,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758471160] [2022-03-15 16:19:02,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:02,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:19:02,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:19:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:19:02,468 INFO L87 Difference]: Start difference. First operand 2966 states and 9794 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:03,507 INFO L93 Difference]: Finished difference Result 3474 states and 11435 transitions. [2022-03-15 16:19:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:19:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:03,514 INFO L225 Difference]: With dead ends: 3474 [2022-03-15 16:19:03,514 INFO L226 Difference]: Without dead ends: 3468 [2022-03-15 16:19:03,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:19:03,515 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:03,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 187 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1348 Invalid, 0 Unknown, 269 Unchecked, 0.5s Time] [2022-03-15 16:19:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2022-03-15 16:19:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2969. [2022-03-15 16:19:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2968 states have (on average 3.30222371967655) internal successors, (9801), 2968 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 9801 transitions. [2022-03-15 16:19:03,557 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 9801 transitions. Word has length 24 [2022-03-15 16:19:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 9801 transitions. [2022-03-15 16:19:03,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 9801 transitions. [2022-03-15 16:19:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:03,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:03,562 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] [2022-03-15 16:19:03,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-15 16:19:03,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-15 16:19:03,762 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash -589719087, now seen corresponding path program 18 times [2022-03-15 16:19:03,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:03,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002723779] [2022-03-15 16:19:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:03,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:03,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002723779] [2022-03-15 16:19:03,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002723779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:03,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224392098] [2022-03-15 16:19:03,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:03,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:03,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:03,969 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:03,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-15 16:19:03,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:19:03,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:03,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:19:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:04,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:04,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 49 [2022-03-15 16:19:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:04,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:05,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:05,580 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 41 treesize of output 7 [2022-03-15 16:19:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:05,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224392098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:05,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:05,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-15 16:19:05,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438464157] [2022-03-15 16:19:05,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:05,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:19:05,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:19:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:19:05,613 INFO L87 Difference]: Start difference. First operand 2969 states and 9801 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:06,703 INFO L93 Difference]: Finished difference Result 3533 states and 11572 transitions. [2022-03-15 16:19:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:19:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:06,710 INFO L225 Difference]: With dead ends: 3533 [2022-03-15 16:19:06,710 INFO L226 Difference]: Without dead ends: 3523 [2022-03-15 16:19:06,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:19:06,710 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:06,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 252 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 996 Invalid, 0 Unknown, 508 Unchecked, 0.4s Time] [2022-03-15 16:19:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2022-03-15 16:19:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2977. [2022-03-15 16:19:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.3010752688172045) internal successors, (9824), 2976 states have internal predecessors, (9824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9824 transitions. [2022-03-15 16:19:06,751 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9824 transitions. Word has length 24 [2022-03-15 16:19:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 2977 states and 9824 transitions. [2022-03-15 16:19:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9824 transitions. [2022-03-15 16:19:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:06,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:06,755 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] [2022-03-15 16:19:06,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-15 16:19:06,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-15 16:19:06,955 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1122224872, now seen corresponding path program 6 times [2022-03-15 16:19:06,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:06,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016496321] [2022-03-15 16:19:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:06,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:07,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:07,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016496321] [2022-03-15 16:19:07,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016496321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:07,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556856704] [2022-03-15 16:19:07,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:07,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:07,163 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:07,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-15 16:19:07,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:19:07,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:07,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:07,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:07,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:07,484 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 17 [2022-03-15 16:19:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:07,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:07,781 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:07,781 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 20 treesize of output 43 [2022-03-15 16:19:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:07,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:07,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:07,836 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 20 treesize of output 3 [2022-03-15 16:19:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:07,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556856704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:07,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:07,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-15 16:19:07,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277386514] [2022-03-15 16:19:07,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:07,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:19:07,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:19:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:19:07,853 INFO L87 Difference]: Start difference. First operand 2977 states and 9824 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:09,449 INFO L93 Difference]: Finished difference Result 3598 states and 11823 transitions. [2022-03-15 16:19:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:19:09,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:09,456 INFO L225 Difference]: With dead ends: 3598 [2022-03-15 16:19:09,456 INFO L226 Difference]: Without dead ends: 3592 [2022-03-15 16:19:09,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:19:09,456 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:09,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 148 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1819 Invalid, 0 Unknown, 615 Unchecked, 0.7s Time] [2022-03-15 16:19:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-03-15 16:19:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2970. [2022-03-15 16:19:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 3.303469181542607) internal successors, (9808), 2969 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 9808 transitions. [2022-03-15 16:19:09,507 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 9808 transitions. Word has length 24 [2022-03-15 16:19:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:09,507 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 9808 transitions. [2022-03-15 16:19:09,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 9808 transitions. [2022-03-15 16:19:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:09,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:09,511 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] [2022-03-15 16:19:09,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-15 16:19:09,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-03-15 16:19:09,711 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -57853730, now seen corresponding path program 26 times [2022-03-15 16:19:09,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:09,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278645905] [2022-03-15 16:19:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:09,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:09,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:09,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278645905] [2022-03-15 16:19:09,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278645905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:09,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107248771] [2022-03-15 16:19:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:09,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:09,917 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:09,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-15 16:19:09,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:09,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:10,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:10,292 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 35 treesize of output 47 [2022-03-15 16:19:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:10,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:10,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:10,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:10,969 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 45 treesize of output 7 [2022-03-15 16:19:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:11,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107248771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:11,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:11,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:19:11,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292459904] [2022-03-15 16:19:11,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:11,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:19:11,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:19:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:19:11,000 INFO L87 Difference]: Start difference. First operand 2970 states and 9808 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:13,392 INFO L93 Difference]: Finished difference Result 4051 states and 13632 transitions. [2022-03-15 16:19:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:19:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:19:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:13,399 INFO L225 Difference]: With dead ends: 4051 [2022-03-15 16:19:13,399 INFO L226 Difference]: Without dead ends: 4039 [2022-03-15 16:19:13,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=509, Invalid=5041, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:19:13,400 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 263 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1510 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:13,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 193 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1403 Invalid, 0 Unknown, 1510 Unchecked, 0.6s Time] [2022-03-15 16:19:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-03-15 16:19:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2993. [2022-03-15 16:19:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.304812834224599) internal successors, (9888), 2992 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 9888 transitions. [2022-03-15 16:19:13,448 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 9888 transitions. Word has length 24 [2022-03-15 16:19:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:13,448 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 9888 transitions. [2022-03-15 16:19:13,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:13,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 9888 transitions. [2022-03-15 16:19:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:13,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:13,453 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] [2022-03-15 16:19:13,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-15 16:19:13,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:13,653 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:13,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1713164960, now seen corresponding path program 27 times [2022-03-15 16:19:13,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:13,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224915026] [2022-03-15 16:19:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:13,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:13,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224915026] [2022-03-15 16:19:13,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224915026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:13,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504009000] [2022-03-15 16:19:13,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:19:13,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:13,867 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:13,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-15 16:19:13,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:19:13,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:19:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:14,337 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 29 treesize of output 17 [2022-03-15 16:19:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:14,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:14,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:14,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:14,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 54 [2022-03-15 16:19:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:14,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504009000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:14,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:14,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-15 16:19:14,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612006487] [2022-03-15 16:19:14,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:14,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:19:14,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:19:14,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:19:14,829 INFO L87 Difference]: Start difference. First operand 2993 states and 9888 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:16,260 INFO L93 Difference]: Finished difference Result 3720 states and 12312 transitions. [2022-03-15 16:19:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:19:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:16,267 INFO L225 Difference]: With dead ends: 3720 [2022-03-15 16:19:16,267 INFO L226 Difference]: Without dead ends: 3714 [2022-03-15 16:19:16,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=309, Invalid=2553, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:19:16,268 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:16,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 139 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1266 Invalid, 0 Unknown, 411 Unchecked, 0.6s Time] [2022-03-15 16:19:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-03-15 16:19:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3006. [2022-03-15 16:19:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.304159733777038) internal successors, (9929), 3005 states have internal predecessors, (9929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9929 transitions. [2022-03-15 16:19:16,331 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9929 transitions. Word has length 24 [2022-03-15 16:19:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 9929 transitions. [2022-03-15 16:19:16,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9929 transitions. [2022-03-15 16:19:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:16,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:16,335 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] [2022-03-15 16:19:16,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-15 16:19:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-15 16:19:16,535 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1968870974, now seen corresponding path program 28 times [2022-03-15 16:19:16,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:16,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181450611] [2022-03-15 16:19:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:16,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:16,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181450611] [2022-03-15 16:19:16,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181450611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:16,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410399750] [2022-03-15 16:19:16,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:16,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:16,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:16,740 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:16,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-15 16:19:16,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:16,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:17,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:17,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:17,067 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 17 [2022-03-15 16:19:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:17,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:17,381 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:17,381 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 20 treesize of output 43 [2022-03-15 16:19:17,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:17,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:17,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:17,428 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 20 treesize of output 3 [2022-03-15 16:19:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:17,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410399750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:17,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:17,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:19:17,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871528016] [2022-03-15 16:19:17,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:17,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:19:17,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:19:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:19:17,446 INFO L87 Difference]: Start difference. First operand 3006 states and 9929 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:19,038 INFO L93 Difference]: Finished difference Result 3727 states and 12338 transitions. [2022-03-15 16:19:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:19:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:19,046 INFO L225 Difference]: With dead ends: 3727 [2022-03-15 16:19:19,046 INFO L226 Difference]: Without dead ends: 3721 [2022-03-15 16:19:19,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=2456, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:19:19,046 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:19,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 213 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1719 Invalid, 0 Unknown, 393 Unchecked, 0.7s Time] [2022-03-15 16:19:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-03-15 16:19:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 2999. [2022-03-15 16:19:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.304202801867912) internal successors, (9906), 2998 states have internal predecessors, (9906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9906 transitions. [2022-03-15 16:19:19,091 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9906 transitions. Word has length 24 [2022-03-15 16:19:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:19,092 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 9906 transitions. [2022-03-15 16:19:19,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9906 transitions. [2022-03-15 16:19:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:19,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:19,096 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] [2022-03-15 16:19:19,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-03-15 16:19:19,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-03-15 16:19:19,296 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 161416511, now seen corresponding path program 6 times [2022-03-15 16:19:19,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:19,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665843589] [2022-03-15 16:19:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:19,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:19,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665843589] [2022-03-15 16:19:19,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665843589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:19,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98684349] [2022-03-15 16:19:19,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:19,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:19,502 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:19,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-15 16:19:19,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:19:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:19,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:19,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:19,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:19,890 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 35 treesize of output 47 [2022-03-15 16:19:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:20,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,523 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 45 treesize of output 7 [2022-03-15 16:19:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98684349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:20,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:20,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:19:20,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927033455] [2022-03-15 16:19:20,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:20,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:19:20,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:19:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:19:20,555 INFO L87 Difference]: Start difference. First operand 2999 states and 9906 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:24,294 INFO L93 Difference]: Finished difference Result 4885 states and 16541 transitions. [2022-03-15 16:19:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:19:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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 24 [2022-03-15 16:19:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:24,305 INFO L225 Difference]: With dead ends: 4885 [2022-03-15 16:19:24,305 INFO L226 Difference]: Without dead ends: 4875 [2022-03-15 16:19:24,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=803, Invalid=7753, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:19:24,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 249 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1180 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:24,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 223 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1727 Invalid, 0 Unknown, 1180 Unchecked, 0.9s Time] [2022-03-15 16:19:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-15 16:19:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3029. [2022-03-15 16:19:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.3051519154557463) internal successors, (10008), 3028 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 10008 transitions. [2022-03-15 16:19:24,363 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 10008 transitions. Word has length 24 [2022-03-15 16:19:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:24,363 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 10008 transitions. [2022-03-15 16:19:24,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 10008 transitions. [2022-03-15 16:19:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:24,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:24,367 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] [2022-03-15 16:19:24,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:24,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:24,568 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1854805089, now seen corresponding path program 19 times [2022-03-15 16:19:24,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:24,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790313267] [2022-03-15 16:19:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:24,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:24,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790313267] [2022-03-15 16:19:24,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790313267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:24,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088705025] [2022-03-15 16:19:24,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:24,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:24,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:24,783 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:24,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-15 16:19:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:24,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:24,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:25,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:25,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:25,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:25,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:25,090 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 17 [2022-03-15 16:19:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:25,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:25,371 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:25,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:19:25,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:25,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:25,418 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 20 treesize of output 3 [2022-03-15 16:19:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:25,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088705025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:25,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:25,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:19:25,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170528602] [2022-03-15 16:19:25,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:19:25,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:19:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:19:25,435 INFO L87 Difference]: Start difference. First operand 3029 states and 10008 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:27,037 INFO L93 Difference]: Finished difference Result 4651 states and 15957 transitions. [2022-03-15 16:19:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:19:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:27,047 INFO L225 Difference]: With dead ends: 4651 [2022-03-15 16:19:27,047 INFO L226 Difference]: Without dead ends: 4645 [2022-03-15 16:19:27,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:19:27,048 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 203 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:27,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 177 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1838 Invalid, 0 Unknown, 969 Unchecked, 0.8s Time] [2022-03-15 16:19:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2022-03-15 16:19:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 3043. [2022-03-15 16:19:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.304733727810651) internal successors, (10053), 3042 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10053 transitions. [2022-03-15 16:19:27,100 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10053 transitions. Word has length 24 [2022-03-15 16:19:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:27,100 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 10053 transitions. [2022-03-15 16:19:27,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10053 transitions. [2022-03-15 16:19:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:27,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:27,104 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] [2022-03-15 16:19:27,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-15 16:19:27,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:27,305 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 588337472, now seen corresponding path program 7 times [2022-03-15 16:19:27,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:27,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304592942] [2022-03-15 16:19:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:27,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:27,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304592942] [2022-03-15 16:19:27,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304592942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:27,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231439065] [2022-03-15 16:19:27,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:27,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:27,522 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:27,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-15 16:19:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:27,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:27,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:27,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:19:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:27,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:28,134 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:28,135 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 20 treesize of output 43 [2022-03-15 16:19:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:28,190 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 20 treesize of output 3 [2022-03-15 16:19:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:28,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231439065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:28,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:28,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:19:28,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294279152] [2022-03-15 16:19:28,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:28,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:19:28,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:19:28,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:19:28,208 INFO L87 Difference]: Start difference. First operand 3043 states and 10053 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:30,386 INFO L93 Difference]: Finished difference Result 4373 states and 14911 transitions. [2022-03-15 16:19:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:19:30,386 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:30,394 INFO L225 Difference]: With dead ends: 4373 [2022-03-15 16:19:30,395 INFO L226 Difference]: Without dead ends: 4371 [2022-03-15 16:19:30,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:19:30,395 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 183 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:30,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 207 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1731 Invalid, 0 Unknown, 672 Unchecked, 0.8s Time] [2022-03-15 16:19:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-15 16:19:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3056. [2022-03-15 16:19:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.3037643207855973) internal successors, (10093), 3055 states have internal predecessors, (10093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10093 transitions. [2022-03-15 16:19:30,445 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10093 transitions. Word has length 24 [2022-03-15 16:19:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:30,445 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 10093 transitions. [2022-03-15 16:19:30,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10093 transitions. [2022-03-15 16:19:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:30,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:30,449 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] [2022-03-15 16:19:30,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-15 16:19:30,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:30,650 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:30,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1982548168, now seen corresponding path program 29 times [2022-03-15 16:19:30,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:30,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767822343] [2022-03-15 16:19:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:30,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:30,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767822343] [2022-03-15 16:19:30,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767822343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:30,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967689310] [2022-03-15 16:19:30,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:30,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:30,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:30,850 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:30,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-15 16:19:30,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:19:30,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:31,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:31,152 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 17 [2022-03-15 16:19:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:31,428 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-15 16:19:31,428 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-15 16:19:31,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:31,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:31,483 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 20 treesize of output 3 [2022-03-15 16:19:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:31,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967689310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:31,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:31,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-15 16:19:31,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886330568] [2022-03-15 16:19:31,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:31,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:19:31,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:19:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:19:31,500 INFO L87 Difference]: Start difference. First operand 3056 states and 10093 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:33,385 INFO L93 Difference]: Finished difference Result 4072 states and 13690 transitions. [2022-03-15 16:19:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:19:33,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:19:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:33,393 INFO L225 Difference]: With dead ends: 4072 [2022-03-15 16:19:33,393 INFO L226 Difference]: Without dead ends: 4066 [2022-03-15 16:19:33,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=2928, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:19:33,393 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:33,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 167 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1686 Invalid, 0 Unknown, 527 Unchecked, 0.7s Time] [2022-03-15 16:19:33,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2022-03-15 16:19:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3081. [2022-03-15 16:19:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.301948051948052) internal successors, (10170), 3080 states have internal predecessors, (10170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 10170 transitions. [2022-03-15 16:19:33,438 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 10170 transitions. Word has length 24 [2022-03-15 16:19:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:33,438 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 10170 transitions. [2022-03-15 16:19:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 10170 transitions. [2022-03-15 16:19:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:19:33,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:33,443 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] [2022-03-15 16:19:33,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-15 16:19:33,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:33,643 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-15 16:19:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2115905623, now seen corresponding path program 20 times [2022-03-15 16:19:33,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:33,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878515912] [2022-03-15 16:19:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:33,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:33,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878515912] [2022-03-15 16:19:33,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878515912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:33,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647604797] [2022-03-15 16:19:33,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:33,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:33,853 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:33,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-15 16:19:33,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:19:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:34,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:34,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:34,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,209 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 39 treesize of output 21 [2022-03-15 16:19:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:34,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:34,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:34,748 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 45 treesize of output 52 [2022-03-15 16:19:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:34,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647604797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:34,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:34,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-15 16:19:34,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669817785] [2022-03-15 16:19:34,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:34,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:19:34,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:19:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:19:34,841 INFO L87 Difference]: Start difference. First operand 3081 states and 10170 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) Received shutdown request... [2022-03-15 16:19:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:19:37,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=581, Invalid=5271, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:19:37,693 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:37,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 172 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1653 Invalid, 0 Unknown, 638 Unchecked, 0.8s Time] [2022-03-15 16:19:37,694 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (6 of 7 remaining) [2022-03-15 16:19:37,709 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:19:37,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:37,720 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:19:37,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-15 16:19:37,895 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. [2022-03-15 16:19:37,896 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (5 of 7 remaining) [2022-03-15 16:19:37,896 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5INUSE_VIOLATION (4 of 7 remaining) [2022-03-15 16:19:37,896 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (3 of 7 remaining) [2022-03-15 16:19:37,896 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (2 of 7 remaining) [2022-03-15 16:19:37,896 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err0INUSE_VIOLATION (1 of 7 remaining) [2022-03-15 16:19:37,896 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err1INUSE_VIOLATION (0 of 7 remaining) [2022-03-15 16:19:37,900 INFO L732 BasicCegarLoop]: Path program histogram: [145, 29, 25, 25, 21, 20, 7, 6, 6, 6, 3, 2, 2, 1, 1] [2022-03-15 16:19:37,903 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:19:37,903 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:19:37,904 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:19:37 BasicIcfg [2022-03-15 16:19:37,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:19:37,905 INFO L158 Benchmark]: Toolchain (without parser) took 746249.85ms. Allocated memory was 169.9MB in the beginning and 369.1MB in the end (delta: 199.2MB). Free memory was 131.4MB in the beginning and 188.1MB in the end (delta: -56.8MB). Peak memory consumption was 143.0MB. Max. memory is 8.0GB. [2022-03-15 16:19:37,905 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 169.9MB. Free memory is still 132.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:19:37,905 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.78ms. Allocated memory is still 169.9MB. Free memory was 131.3MB in the beginning and 129.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:19:37,905 INFO L158 Benchmark]: Boogie Preprocessor took 19.35ms. Allocated memory is still 169.9MB. Free memory was 129.7MB in the beginning and 128.8MB in the end (delta: 919.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:19:37,905 INFO L158 Benchmark]: RCFGBuilder took 266.42ms. Allocated memory is still 169.9MB. Free memory was 128.8MB in the beginning and 118.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-15 16:19:37,905 INFO L158 Benchmark]: TraceAbstraction took 745931.43ms. Allocated memory was 169.9MB in the beginning and 369.1MB in the end (delta: 199.2MB). Free memory was 118.2MB in the beginning and 188.1MB in the end (delta: -70.0MB). Peak memory consumption was 129.4MB. Max. memory is 8.0GB. [2022-03-15 16:19:37,905 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 0.12ms. Allocated memory is still 169.9MB. Free memory is still 132.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.78ms. Allocated memory is still 169.9MB. Free memory was 131.3MB in the beginning and 129.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 19.35ms. Allocated memory is still 169.9MB. Free memory was 129.7MB in the beginning and 128.8MB in the end (delta: 919.1kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 266.42ms. Allocated memory is still 169.9MB. Free memory was 128.8MB in the beginning and 118.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 745931.43ms. Allocated memory was 169.9MB in the beginning and 369.1MB in the end (delta: 199.2MB). Free memory was 118.2MB in the beginning and 188.1MB in the end (delta: -70.0MB). Peak memory consumption was 129.4MB. 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: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 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 constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 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 constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3081states) and FLOYD_HOARE automaton (currently 61 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 745.8s, OverallIterations: 299, TraceHistogramMax: 2, PathProgramHistogramMax: 145, EmptinessCheckTime: 0.7s, AutomataDifference: 409.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46859 SdHoareTripleChecker+Valid, 153.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46859 mSDsluCounter, 42690 SdHoareTripleChecker+Invalid, 129.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 171367 IncrementalHoareTripleChecker+Unchecked, 242000 mSDsCounter, 12426 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 353226 IncrementalHoareTripleChecker+Invalid, 537019 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12426 mSolverCounterUnsat, 3762 mSDtfsCounter, 353226 mSolverCounterSat, 1.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23359 GetRequests, 8873 SyntacticMatches, 1456 SemanticMatches, 13029 ConstructedPredicates, 0 IntricatePredicates, 81 DeprecatedPredicates, 177206 ImplicationChecksByTransitivity, 358.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3081occurred in iteration=298, InterpolantAutomatonStates: 10326, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.0s AutomataMinimizationTime, 298 MinimizatonAttempts, 175427 StatesRemovedByMinimization, 297 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 259.0s InterpolantComputationTime, 13388 NumberOfCodeBlocks, 13388 NumberOfCodeBlocksAsserted, 914 NumberOfCheckSat, 19103 ConstructedInterpolants, 2856 QuantifiedInterpolants, 339232 SizeOfPredicates, 2627 NumberOfNonLiveVariables, 23058 ConjunctsInSsa, 8023 ConjunctsInUnsatCore, 873 InterpolantComputations, 12 PerfectInterpolantSequences, 238/5194 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